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- 4 large yellow onions, finely sliced - 2 tablespoons olive oil - 2 tablespoons unsalted butter - 1 teaspoon sugar - 1 teaspoon salt - 1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme) - 1 cup ricotta cheese - 1 cup shredded mozzarella cheese - 1 pre-made puff pastry sheet (thawed) - Freshly cracked black pepper, to taste - Balsamic glaze (for drizzling, optional) You can add a pinch of red pepper flakes for heat. A sprinkle of Parmesan cheese can enhance the flavor. Try adding sautéed mushrooms for depth. You can also use goat cheese instead of ricotta for a tangy twist. If you don’t have yellow onions, use sweet onions. For a dairy-free option, swap ricotta with cashew cheese. You can replace mozzarella with any cheese that melts well, like Gouda. If you lack fresh thyme, dried herbs will work great too. To start, take your large yellow onions and slice them thinly. I like to use a sharp knife for this step. In a large skillet, melt the butter with the olive oil over medium heat. Once it’s hot, add the sliced onions, sugar, and salt. Stir often to prevent sticking. Cook for about 25-30 minutes. You want the onions to turn a nice golden brown. During the last five minutes, mix in the fresh thyme leaves. Take the skillet off the heat and let the onions cool a bit. Now it’s time to work on the puff pastry. Take your thawed pastry sheet and place it on a lightly floured surface. Roll it out gently with a rolling pin to remove any creases. Next, transfer it to a baking sheet lined with parchment paper. You can shape the pastry into a rectangle or a circle based on your preference. Trim the edges if you want a neat look. In a small bowl, mix the ricotta cheese with a pinch of black pepper. Spread this mixture evenly over the puff pastry, leaving a small border around the edges. Now, it’s time for the caramelized onions. Spoon them over the ricotta layer, spreading them out evenly. Finally, sprinkle the shredded mozzarella cheese on top. Place the tart in the preheated oven at 400°F (200°C). Bake for about 20-25 minutes. You want the pastry to turn golden brown and the cheese to bubble. Once done, take it out and let it cool for a few minutes. If you like, drizzle some balsamic glaze over the tart. Slice it into wedges and serve warm or at room temperature. Enjoy your delicious creation! For a full recipe, check the details above. To get the best flavor from the onions, use low heat. This avoids burning. Stir the onions often. It helps them cook evenly. The sugar in the recipe enhances the natural sweetness. You want soft, brown onions. This may take 25-30 minutes. Be patient! The longer they cook, the deeper the flavor. This tart is great warm or at room temperature. Serve it as an appetizer or a side dish. Pair it with a fresh salad for a nice balance. A light vinaigrette works well to cut through the richness. For a twist, add a dollop of sour cream on top. Make the tart shine by serving it on a wooden board. Add sprigs of fresh thyme for color. This gives a rustic look that feels inviting. Slice the tart into wedges for easy serving. A drizzle of balsamic glaze adds a beautiful touch. Your guests will be impressed with the look and taste! {{image_4}} You can spice up the tart by adding different cheese blends. Creamy goat cheese pairs well with caramelized onions. You can also use sharp cheddar for a bold taste. Mixing cheeses adds depth and richness to each bite. Try a blend of mozzarella and gouda for a smoky flavor. Cheese not only enhances taste but also improves texture. Fresh herbs can elevate your tart. Basil and rosemary add a nice twist. You can mix in chopped parsley for a fresh note. Consider using sage for an earthy flavor. Infusing herbs into the onion mixture adds more aroma and depth. Always adjust the amount based on your personal preference. Herbs can transform a simple dish into something special. You can add other vegetables for extra nutrition and flavor. Spinach or kale works well, adding color and health benefits. Roasted red peppers bring sweetness and a pop of color. Mushrooms add a lovely umami taste. Just sauté them briefly before adding to the tart. Mix and match your favorites to create a unique version. These additions make your tart hearty and satisfying. To store your caramelized onion tart, first let it cool. Wrap it tightly in plastic wrap or foil. Place it in the fridge. It will stay fresh for up to three days. Make sure to keep it covered to prevent it from drying out. You can freeze the tart for later use. After cooling, wrap it well in plastic wrap, then in foil. This helps prevent freezer burn. The tart will last up to three months in the freezer. When you’re ready to eat it, let it thaw in the fridge overnight. To reheat your tart, preheat the oven to 350°F (175°C). Remove the plastic wrap but keep the foil on. Place the tart in the oven for about 15-20 minutes. This warms it through and keeps the crust crisp. You can also microwave individual slices for about 1-2 minutes, but the crust may not be as crispy. Enjoy your delicious tart! Yes, you can make this tart ahead of time. Prepare the tart up to the baking step. Cover it and store it in the fridge for one day. When ready to bake, simply remove it from the fridge and let it sit at room temperature for 15 minutes. Then bake it as directed. This saves time and gives you a warm treat later. Caramelized onion tart pairs well with many sides. Here are some great options: - Mixed green salad with a light vinaigrette - Roasted vegetables for added flavor - A bowl of creamy soup, like tomato or potato - Fresh fruit, such as sliced pears or apples These sides balance the rich flavors of the tart, enhancing your meal. You can tell onions are caramelized when they are soft and golden brown. This process takes about 25-30 minutes. Stir the onions often to prevent burning. If they stick to the pan, add a splash of water. The sugar in the onions will bring out a sweet flavor, which is key to a great tart. This blog post covered all you need to know for a perfect caramelized onion tart. We discussed key ingredients, how to prepare them, and tips to enhance flavor. Remember, the right techniques can make a big difference. Whether you add cheese or herbs, there are many tasty variations. Store leftovers properly, and reheating is simple. This tart is not just a treat; it's a creative dish you can share. Enjoy your cooking and impress friends with this delicious recipe!

Caramelized Onion Tart

Indulge in the delicious flavors of this Savory Caramelized Onion Tart! Made with sweet caramelized onions, creamy ricotta, and melty mozzarella, it’s the perfect appetizer or light meal. Follow our easy step-by-step instructions to create a golden, flaky pastry that will impress your guests. Ready to elevate your cooking game? Click through for the full recipe and enjoy this delightful dish!
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Ingredients
  

4 large yellow onions, finely sliced

2 tablespoons olive oil

2 tablespoons unsalted butter

1 teaspoon sugar

1 teaspoon salt

1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)

1 cup ricotta cheese

1 cup shredded mozzarella cheese

1 pre-made puff pastry sheet (thawed)

Freshly cracked black pepper, to taste

Balsamic glaze (for drizzling, optional)

Instructions
 

Preheat the Oven: Begin by preheating your oven to 400°F (200°C) to ensure it’s hot when the tart is ready to bake.

    Caramelize the Onions: In a large skillet over medium heat, melt the butter along with the olive oil. Once melted, add the sliced onions, sugar, and salt. Cook the onions, stirring frequently, for approximately 25-30 minutes. You want them to become deeply golden brown and wonderfully caramelized. During the last 5 minutes of cooking, mix in the fresh thyme. Once done, take the skillet off the heat and let the onions cool slightly.

      Prepare the Puff Pastry: On a lightly floured surface, gently roll out the thawed puff pastry sheet to help smooth out any creases. Transfer the rolled pastry to a baking sheet lined with parchment paper. You can trim the edges if desired, shaping it into either a rectangle or a circle.

        Spread the Cheese: In a small mixing bowl, combine the ricotta cheese with a pinch of freshly cracked black pepper. Spread this ricotta mixture evenly over the surface of the puff pastry, making sure to leave a small border around the edges for a nice crust.

          Layer the Onions: Carefully spoon the caramelized onions over the ricotta layer, distributing them evenly to ensure every bite is flavorful. Finally, sprinkle the shredded mozzarella cheese generously over the top.

            Bake: Place the assembled tart in the preheated oven and bake for about 20-25 minutes. You’re looking for a golden-brown pastry with bubbling cheese on top.

              Finish and Serve: Once baked, remove the tart from the oven and allow it to cool for a few minutes. If you choose to use balsamic glaze, drizzle it lightly over the tart for an extra touch of flavor. Slice the tart into wedges and serve warm, or at room temperature for a delightful treat.

                Prep Time: 15 min | Total Time: 50 min | Servings: 6-8 slices

                  - Presentation Tips: For an appealing presentation, serve the tart on a rustic wooden board, garnished with fresh thyme sprigs. Pair it with a side of mixed greens for a refreshing contrast that balances the richness of the tart.