Ingredients:
1 sheet puff pastry, thawed
2 large onions, thinly sliced
1 tablespoon olive oil
1 teaspoon sugar
1/2 teaspoon salt
4 ounces Brie cheese, sliced
1 teaspoon fresh thyme leaves
1 egg, beaten (for egg wash)
Directions:
Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a skillet, heat olive oil over medium heat. Add sliced onions, sugar, and salt. Cook for 15–20 minutes, stirring occasionally, until onions are caramelized and golden brown. Remove from heat and let cool slightly.
Roll out puff pastry and cut into 12 equal squares. Place on the prepared baking sheet.
Top each pastry square with a spoonful of caramelized onions and a slice of Brie. Sprinkle with fresh thyme leaves.
Brush the edges of each pastry square with beaten egg.
Bake for 12–15 minutes, or until puff pastry is golden and the cheese is melted.
Serve warm as an appetizer or snack.
Prep Time: 15 minutes | Cooking Time: 20 minutes | Total Time: 35 minutes
Kcal: 250 kcal | Servings: 12 tartlets