Caramelized Onion Tart with Gorgonzola and Brie

Ingredients

• 2 large yellow onions, thinly sliced
• 2 tablespoons unsalted butter
• 1 tablespoon olive oil
• 1 sheet puff pastry, thawed
• 3 ounces Gorgonzola cheese, crumbled
• 4 ounces Brie cheese, sliced
• 1 teaspoon fresh thyme leaves
• 1/4 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 1 egg, beaten (for egg wash)

Instructions

1. 1

   Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.

2. 2

   In a large skillet over medium-low heat, melt butter and olive oil. Add onions, salt, and pepper. Cook, stirring occasionally, for about 25-30 minutes or until onions are golden brown and caramelized.

3. 3

   Roll out the puff pastry onto the prepared baking sheet. Use a knife to lightly score a 1-inch border around the edges (do not cut through).

4. 4

   Spread the caramelized onions evenly within the border of the puff pastry. Top with crumbled Gorgonzola, sliced Brie, and sprinkle with thyme leaves.

5. 5

   Brush the pastry border with beaten egg. Bake for 18-20 minutes, or until the pastry is golden and the cheese is melted and bubbly.

6. 6

   Let the tart cool slightly before slicing. Serve warm or at room temperature.