Description
A savory, flaky puff pastry slab topped with sweet caramelized onions, nutty Gruyère cheese, and fresh thyme, perfect as an appetizer or light meal.
Ingredients
Scale
For the Crust:
- 1 sheet frozen puff pastry, thawed
- 2 large yellow onions, thinly sliced
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 1 teaspoon granulated sugar
- 1 cup shredded Gruyère cheese
- 1 tablespoon fresh thyme leaves
- Salt and black pepper to taste
- 1 egg, beaten (for egg wash)
Instructions
1. Prepare the Crust:
- Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
- In a large skillet, melt butter with olive oil over medium heat. Add onions, sugar, salt, and pepper. Cook, stirring occasionally, until onions are soft and caramelized, about 20-25 minutes. Remove from heat and let cool slightly.
- Roll out puff pastry on the prepared baking sheet. Prick all over with a fork, leaving a 1/2-inch border around edges.
- Spread caramelized onions evenly over the pastry, sprinkle with Gruyère cheese and thyme leaves. Brush edges with egg wash.
- Bake for 20-25 minutes, until pastry is golden and puffed. Let cool for 5 minutes before slicing into squares.
Notes
You can customize the seasonings to taste.