Caramelized Rum Onion, Apple and Cheddar Upside Down Tart

Welcome to a culinary journey that beautifully marries the crisp sweetness of apples with the sharp tang of cheddar, all brought together by the deep, aromatic notes of caramelized rum onions. This exquisite Apple & Cheddar Upside Down Tart with Caramelized Rum Onions isn’t just a recipe; it’s a delightful appetizer, a savory snack, and a testament to the power of exceptional ingredients. Prepare to elevate your entertaining with this unique and unforgettable dish.

Just like that, another cherished memory is etched into the books as my sixth Fresh Air Retreat recently concluded. It’s truly hard to fathom that I’ve had the immense privilege of co-hosting this incredible event alongside the brilliant Liz of The Lemon Bowl for over half a decade now. These retreats are more than just gatherings; they are vibrant hubs where food bloggers from every corner of the country converge in stunning homes, sharing exquisite food, engaging in candid conversations about industry challenges, and fostering genuine connections. It’s an experience that profoundly enriches my spirit and fuels my passion.

Our most recent adventure brought us to a city that holds a special place in my heart: Austin, Texas. Infused with that quintessential Texas spirit of “bigger and better,” we embarked on a whirlwind few days filled with insightful discussions, educational experiences, and unparalleled networking. A significant part of this enriching journey was made possible by our truly remarkable sponsors: Envy Apples, Raptive, Zwilling USA, Dave’s Killer Bread, and Flor de Caña. Each sponsor didn’t just present their products; they curated unique, interactive activations that allowed us to dive deep into their brand stories, fostering not only understanding but also meaningful personal connections.

Unforgettable Highlights from the Fresh Air Retreat in Austin

The Austin retreat was packed with memorable moments and delicious discoveries. Here are some of the standout experiences that left a lasting impression:

Envy Apple Five-Course Culinary Journey

As someone whose daily routine rarely includes a formal lunch, the five-course meal meticulously crafted by the talented Chef Trimell, featuring Envy apples in every dish, was an absolute revelation. It was a mind-blowing exploration of apple versatility. We engaged in lively discussions about all things apples while savoring a sous vide apple amuse-bouche, followed by chicken prepared with apples three distinct ways. The culinary journey continued with a vibrant apple salad, perfectly seared salmon accompanied by an apple walnut risotto, and a spectacular finale: an apple filled with frozen apple ice cream and a delicate chocolate drizzle. Each course showcased the unique characteristics of Envy apples – their crisp texture, balanced sweetness, and how beautifully they integrate into both sweet and savory applications.

Zwilling Knife Demonstration & Innovative Fresh & Save Snacking

My admiration for ZWILLING products is well-known, so the opportunity to expand my culinary knife skills under the expert guidance of Chef Bernard was an absolute highlight. Not only did I gain valuable insights into perfecting my chopping techniques, but I also discovered a newfound appreciation for specialized tools, particularly the need for a dedicated fish knife. Witnessing its precision as it effortlessly sliced through a ripe tomato was truly captivating, demonstrating the superior craftsmanship of Zwilling knives.

Equally impressive was the introduction to ZWILLING’s newly released Fresh & Save collection. As someone who recently completed a kitchen renovation, the prospect of keeping food fresher for longer while simultaneously reducing food waste and saving money is incredibly exciting. I was thrilled to receive their Fresh & Save 7-piece starter set, which served as a fantastic introduction to advanced vacuum seal technology. This comprehensive set includes a variety of container sizes, perfect for everything from storing light lunches to preserving larger home-cooked meals. Additionally, it features reusable vacuum bags in small and medium sizes, ideal for freezing leftovers or maintaining the freshness of delicate ingredients. Beyond vacuum sealing, Zwilling also offers a brilliant dry storage solution called CUBE. These containers exemplify the perfect union of elegant form and practical function. Their minimalist, streamlined design makes them stackable, optimizing pantry space while looking impeccably stylish. They are a testament to how intelligent kitchen organization can be both beautiful and highly efficient.

Dave’s Killer Bread: 90s Dance Cardio & Wholesome Breakfast

Our household proudly counts itself among the enthusiastic fans of Dave’s Killer Bread. For me, the opportunity to craft a vibrant, rainbow-themed breakfast while savoring Chef Trimell’s exquisite bananas foster French toast, made with the rich and wholesome goodness of Dave’s Killer Bread, was an absolute dream come true. The quality and flavor of their bread truly elevated the entire meal, making it a breakfast to remember.

To balance out our delicious indulgence, we dove headfirst into a much-needed and incredibly energetic 90s dance cardio class, where we truly left it all on the floor. It was a fantastic way to energize and connect. And for those moments when you need a quick, nutritious refuel post-dance class or simply on the go, Dave’s Killer Bread has recently unveiled three fantastic new snack bars: the rich and decadent Cocoa Brownie Blitz, the satisfyingly crunchy Trail Mix Crumble, and the delightful Oat-rageous Honey Almond. My son, Charlie, is particularly fond of the Cocoa Brownie Blitz, and I can certainly see why – they are all perfect for a healthy and convenient pick-me-up.

Flor de Caña: Crafting Your Own Espresso Martini Experience

We concluded the retreat with a spectacular happy hour activation featuring Flor de Caña, a brand deeply rooted in history and exceptional quality. Did you know that this esteemed company boasts a legacy of over 130 years, remaining family-owned throughout its impressive journey? One of the many reasons I hold Flor de Caña in such high regard is their unwavering commitment to producing premium rums that are not only sophisticated but also wonderfully approachable for any occasion. Furthermore, their dedication to natural ingredients is commendable – they never use artificial additives or added sugars, ensuring a pure and authentic flavor profile. And here’s a little spoiler alert: I’ll be featuring their exquisite 12-year-aged rum, which is surprisingly the youngest in their collection, in today’s much-anticipated recipe!

Inspired by the Retreat: Crafting the Perfect Apple & Cheddar Upside Down Tart

As I mentioned, returning from the Fresh Air Retreat in Austin, I was brimming with inspiration, eager to channel the incredible culinary experiences into a new recipe. My enthusiasm for Envy apples, in particular, reached new heights. As someone who enjoys an apple daily, I can confidently say that Envy apples offer an unparalleled balance of sweetness and a truly satisfying, crisp crunch with every bite. Their firm texture and delightful flavor make them exceptional for snacking, but their true brilliance shines in cooking. Unlike many apple varieties, Envy apples maintain their vibrant color and don’t turn yellow or brown when sliced, making them an ideal choice for elegant preparations. This characteristic, combined with the rich depth of Flor de Caña rum, sparked the idea for a truly special dish.

It is with immense pleasure that I introduce you to what I believe will become your new favorite holiday appetizer, or perhaps a delightful savory treat any time of year: the Apple & Cheddar Upside Down Tart with Caramelized Rum Onions. This recipe beautifully encapsulates the spirit of discovery and quality ingredients from the retreat.

An Apple & Cheddar Upside Down Tart with Caramelized Rum Onions is more than just an appetizer; it’s a symphony of flavors and textures designed to impress. Let’s break down the key components that make this dish so extraordinary:

• Apple & Cheddar: At the heart of this tart lies the classic, beloved combination of thinly sliced apples and sharp cheddar cheese. The natural sweetness and subtle tartness of the apples provide a perfect counterpoint to the robust, savory notes of the cheddar, creating a harmonious flavor profile that is both comforting and sophisticated.
• Upside Down Tart: This innovative presentation method ensures a stunning visual appeal and a delightful texture. In an upside-down tart, the flavorful ingredients – in this case, the apples, cheese, and caramelized onions – are arranged on the bottom of a baking sheet. During baking, the puff pastry forms a golden, flaky crust over these components. Once baked, the tart is inverted, revealing a beautiful, golden-brown top layer brimming with visible ingredients, creating an elegant and rustic presentation.
• Caramelized Rum Onions: This element is the secret weapon of the tart, elevating it from delicious to unforgettable. Caramelized onions are a culinary marvel, slowly cooked until their natural sugars intensify, transforming them into a soft, deeply sweet, and golden-brown delicacy. In this particular recipe, a splash of Flor de Caña rum is introduced during the caramelization process. This addition infuses the onions with a complex, nuanced flavor – a subtle warmth and a hint of molasses that complements the apples and cheese exquisitely, adding an irresistible depth to every bite.

How to Make this Apple & Cheddar Upside Down Tart with Caramelized Rum Onions:

This tart beautifully balances the sweet and savory with the rich, complex taste of caramelized rum onions. Here’s a detailed guide to creating this impressive appetizer that’s simpler than it looks:

1. Begin by preheating your oven to a precise 400 degrees Fahrenheit (200 degrees Celsius). This ensures your puff pastry will achieve its perfect golden crispness.
2. In a large, sturdy skillet, melt the unsalted butter over medium-low heat. Add your thinly sliced yellow onions and cook patiently, stirring occasionally. This slow cooking process is crucial; allow them to soften and gradually transform into a rich, golden-brown hue, typically taking about 15-20 minutes. This caramelization is key to their sweet, deep flavor.
3. Once the onions are beautifully caramelized, pour the Flor de Caña rum directly into the skillet. Stir continuously, allowing the rum to deglaze the pan and absorb into the onions, intensifying their flavor. Continue cooking for an additional 2 to 3 minutes until the rum is fully absorbed, leaving behind only its aromatic essence. Remove the skillet from the heat and set the onions aside to cool slightly.
4. Prepare your baking sheet by lining it with parchment paper – this is essential for easy flipping. Arrange 3 to 4 thin slices of Envy apples in neat, slightly overlapping rows on the parchment paper. Envision this layout forming the base for approximately 9 equally sized rectangular tarts. Next, generously top each apple section with a sprinkle of shredded cheddar cheese, followed by a spoonful of your fragrant caramelized rum onions.
5. Carefully unroll your defrosted sheet of puff pastry. Using a sharp knife or pastry wheel, cut the pastry into 9 rectangles that are roughly the same size as your apple and onion bases. Gently place one puff pastry rectangle on top of each apple, cheese, and onion mixture. Using the tines of a fork, carefully crimp the edges of the puff pastry, sealing it around the filling and helping it maintain its shape while baking. In a small bowl, whisk one large egg to create an egg wash. Lightly brush the tops of each puff pastry rectangle with this egg wash; this will give them a beautiful golden sheen. Bake in your preheated oven for about 20 minutes, or until the puff pastry is puffed, golden brown, and cooked through.
6. Once baked to perfection, remove the tarts from the oven. Allow them to cool on the baking sheet for just a few minutes – this helps them set slightly. Then, with great care, use a spatula to gently flip each tart over, revealing the stunning caramelized apple and onion topping. Transfer them to a serving platter. For the best flavor and texture, these tarts are truly best enjoyed warm, allowing the cheese to remain slightly molten and the flavors to meld beautifully.

Creative Variations for Your Apple & Cheddar Upside Down Tart:

While the classic Apple & Cheddar Upside Down Tart with Caramelized Rum Onions is spectacular on its own, its versatility allows for exciting variations. Don’t hesitate to experiment and tailor this recipe to your personal preferences or what you have on hand:

• Rosemary and Walnut Infusion: For an earthy and sophisticated twist, consider infusing your caramelized onions with fresh rosemary sprigs while they cook. The herbaceous aroma will add a new dimension of flavor. After inverting the tarts, sprinkle a handful of finely chopped walnuts over the apples for an added layer of texture and a delightful nutty crunch.
• Bold Blue Cheese and Apple Pairing: If you’re a fan of stronger flavors, substitute the cheddar cheese with crumbled blue cheese. The pungent, tangy notes of blue cheese create an intriguing contrast with the sweet apples, resulting in a more daring and complex flavor profile that will surely impress discerning palates.
• Elegant Brie and Cranberry Delight: For a more refined and subtly creamy experience, swap out the cheddar for luscious Brie cheese. Add a thin layer of cranberry sauce or a few fresh cranberries alongside the apples before baking. The creamy Brie, sweet-tart cranberries, and apples create a harmonious blend that’s perfect for festive occasions.
• A Hint of Spicy Kick: If you enjoy a touch of heat, easily enhance the flavor by adding a pinch of cayenne pepper or a few red pepper flakes to the onions as they caramelize. This subtle warmth will provide a lovely counterpoint to the sweetness of the apples and rum, adding an unexpected and delightful zing.
• Goat Cheese and Thyme: Replace cheddar with creamy goat cheese for a tangy, earthy flavor. A sprinkle of fresh thyme over the apples before baking will complement the goat cheese beautifully.
• Prosciutto and Maple Glaze: For a savory and salty element, lay thin slices of prosciutto over the apple and cheese mixture. Instead of rum, finish the caramelized onions with a drizzle of maple syrup for a sweet, smoky glaze.

That concludes our immersive recap of the Fresh Air Retreat in Austin! A heartfelt and immense thank you goes out to our incredible sponsors, whose generosity and innovative spirit made this event truly special: Envy Apples, Zwilling USA, Dave’s Killer Bread, Raptive, and Flor de Caña. Your support is invaluable.

To the extraordinary and fierce women bosses who journeyed to Austin, I am eternally grateful for the opportunity to listen to your inspiring stories, glean motivation, and witness your unwavering determination to keep moving mountains. A special shout-out to Cassy, Juli, Addison, Mary, Christina, Madeline, and Zainab – your energy and insights were truly uplifting.

And to Amanda, our incredible in-house photographer, who magically captured all these beautiful moments with such artistry and skill, you are simply exceptional!

Finally, to the dream team that makes it all happen: Chef Trimell and Liz. I am constantly amazed by your talents, dedication, and boundless creativity, and I am incredibly thankful to share this retreat journey with you both!

Until next time, Austin! Your vibrant spirit and warm hospitality will be missed.