Caramelized Onion Tart: 7 Reasons You’ll Love This Delight

Oh, let me tell you about my absolute favorite dish: the caramelized onion tart! The moment you take a bite, you’re greeted with the rich, sweet flavors of perfectly caramelized onions nestled in a flaky crust that just crumbles in the best way. I remember making this tart for a cozy gathering with friends, and it disappeared in minutes! The aroma wafting through the kitchen was simply divine, and everyone couldn’t stop raving about it. It’s a perfect blend of savory and a touch of sweet, making it an elegant yet comforting dish that’s always a hit, whether it’s a special occasion or just a weeknight dinner.

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Ingredients for Caramelized Onion Tart

  • 1 pie crust (store-bought or homemade)
  • 4 large onions, thinly sliced
  • 2 tablespoons olive oil
  • 1 tablespoon butter
  • 1 teaspoon salt
  • 1 teaspoon sugar
  • 1 cup grated cheese (like Gruyère or goat cheese)
  • 3 eggs
  • 1 cup heavy cream

How to Prepare Caramelized Onion Tart

Now, let’s dive into the magic of making this caramelized onion tart! It might sound a bit fancy, but trust me, it’s quite straightforward. Just follow these steps, and you’ll impress everyone with your culinary skills!

Preheat and Cook Onions

First things first, preheat your oven to 375°F (190°C). While that’s warming up, grab a skillet and heat the olive oil and butter over medium heat. Once they’re nice and hot, toss in your sliced onions, salt, and sugar. Stir them occasionally, letting them cook down for about 25 minutes until they’re beautifully caramelized and golden brown. Oh, the smell will be heavenly!

Assemble the Tart

Once those onions are ready, roll out your pie crust and gently place it in your tart pan. Spread those luscious caramelized onions evenly over the crust, making sure every bite will be packed with flavor. In a separate bowl, whisk together the eggs and heavy cream until smooth. Pour this mixture right over the onions, and then sprinkle your grated cheese on top. It’s all coming together beautifully!

Bake the Tart

Time to bake! Pop your tart into the oven and let it bake for 30-35 minutes. You’ll know it’s done when the edges are golden and the center is set. Just let it cool for a few minutes before slicing. Trust me, the wait will be worth it when you take that first bite!

Tips for Success

To make your caramelized onion tart truly shine, choose sweet onions like Vidalia or Walla Walla for that perfect balance of flavor. Don’t rush the caramelizing process; low and slow is key to achieving that deep, rich color and sweetness! If you want an extra layer of flavor, try adding a splash of balsamic vinegar to the onions right at the end of cooking. And remember, letting the tart cool slightly before slicing helps it hold its shape beautifully. Your guests will be wowed!

Variations on Caramelized Onion Tart

One of the best things about this caramelized onion tart is how versatile it is! You can swap out the cheese for a rich blue cheese or a creamy feta for a different flavor profile. Feeling adventurous? Add fresh herbs like thyme or rosemary to elevate the taste. For a seasonal twist, toss in some sautéed mushrooms or roasted red peppers. The possibilities are endless, so feel free to get creative and make it your own!

Storage & Reheating Instructions

If you have any leftovers (which is rare, but hey, it happens!), store your caramelized onion tart in an airtight container in the refrigerator for up to 3 days. When you’re ready to enjoy it again, simply pop it in a preheated oven at 350°F (175°C) for about 15-20 minutes until warmed through. This way, the crust stays nice and flaky, and those delicious flavors are just as good as the first time around!

Nutritional Information

Here’s a rough estimate of the nutritional data for each slice of this caramelized onion tart: about 350 calories, 25g of fat, 30g of carbohydrates, and 8g of protein. Keep in mind that these values can vary based on the specific ingredients you use, but it gives you a general idea of what you’re enjoying!

FAQ About Caramelized Onion Tart

Got questions about this delicious caramelized onion tart? I’ve got you covered! One common question is, can you swap out the cheese? Absolutely! You can use whatever cheese you love, like sharp cheddar or creamy ricotta for a twist. Another popular query is about serving suggestions—this tart is fantastic warm or at room temperature, making it perfect for picnics or brunch. If you want to make it ahead, just prepare everything and bake it fresh before serving for that irresistible flaky crust. And don’t forget, leftovers (if you have any!) are just as delightful the next day!

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caramelized onion tart

Caramelized Onion Tart: 7 Reasons You’ll Love This Delight

  • Author: Lisa
  • Prep Time: 15 minutes
  • Cook Time: 40 minutes
  • Total Time: 55 minutes
  • Yield: 8 servings 1x
  • Category: Main Dish
  • Method: Baking
  • Cuisine: French
  • Diet: Vegetarian

Description

A savory tart featuring sweet caramelized onions and a flaky crust.


Ingredients

Scale
  • 1 pie crust
  • 4 large onions, thinly sliced
  • 2 tablespoons olive oil
  • 1 tablespoon butter
  • 1 teaspoon salt
  • 1 teaspoon sugar
  • 1 cup grated cheese (like Gruyère or goat cheese)
  • 3 eggs
  • 1 cup heavy cream

Instructions

  1. Preheat your oven to 375°F (190°C).
  2. Heat olive oil and butter in a skillet over medium heat.
  3. Add the onions, salt, and sugar. Cook until onions are caramelized, about 25 minutes.
  4. Roll out the pie crust and place it in a tart pan.
  5. Spread the caramelized onions evenly over the crust.
  6. In a bowl, whisk together eggs and heavy cream. Pour over the onions.
  7. Top with grated cheese.
  8. Bake for 30-35 minutes, until the tart is set and golden.
  9. Let cool for a few minutes before slicing and serving.

Notes

  • For a richer flavor, use a mix of different cheeses.
  • Serve warm or at room temperature.

Nutrition

  • Serving Size: 1 slice
  • Calories: 350
  • Sugar: 5g
  • Sodium: 450mg
  • Fat: 25g
  • Saturated Fat: 12g
  • Unsaturated Fat: 10g
  • Trans Fat: 0g
  • Carbohydrates: 30g
  • Fiber: 2g
  • Protein: 8g
  • Cholesterol: 120mg

Keywords: caramelized onion tart, savory tart, onion tart, French tart

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