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Amazing 1 Caramelized Onion Tart Savory

Caramelized Onion Tart
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This Caramelized Onion Tart offers a wonderfully flaky crust and deeply savory filling. It makes a fantastic appetizer for any gathering. You will love the rich flavor combination.

Ingredients

Scale
  • 1 sheet puff pastry, thawed
  • 3 large yellow onions, thinly sliced
  • 2 tablespoons unsalted butter
  • 1 tablespoon olive oil
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/4 cup heavy cream
  • 1 large egg
  • 1/4 cup grated Gruyère cheese

Instructions

  1. Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
  2. Melt the butter and olive oil in a large skillet over medium heat.
  3. Add the sliced onions, salt, and pepper. Cook slowly, stirring occasionally, for 30 to 40 minutes until the onions are deeply golden brown and sweet.
  4. While the onions cook, lightly whisk the heavy cream and egg together in a small bowl.
  5. Unroll the puff pastry onto the prepared baking sheet. Score a 1-inch border around the edge of the pastry, being careful not to cut all the way through.
  6. Spread the caramelized onions evenly inside the scored border.
  7. Sprinkle the Gruyère cheese over the onions.
  8. Pour the cream and egg mixture gently over the onions and cheese.
  9. Bake for 20 to 25 minutes, or until the pastry is puffed and golden brown.
  10. Let the tart cool slightly before slicing and serving.

Notes

  • Patience is key when caramelizing the onions; low and slow cooking develops the best sweetness.
  • You can substitute Gruyère with Emmentaler or Swiss cheese for a similar nutty flavor.
  • For extra flakiness, chill the pastry briefly before baking.

Nutrition

Find it online: https://whiskdaily.com/caramelized-onion-tart-savory-appetizer/