Description
A savory tart featuring sweet caramelized onions, nutty Gruyère cheese, and aromatic fresh thyme on a buttery, flaky crust.
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 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). Roll out puff pastry on a parchment-lined baking sheet and prick all over with a fork. Brush edges with egg wash.
- In a large skillet, melt butter with olive oil over medium heat. Add onions, sugar, salt, and pepper. Cook, stirring occasionally, until onions are golden brown and caramelized, about 20-25 minutes.
- Spread caramelized onions evenly over puff pastry, leaving a 1-inch border. Sprinkle with Gruyère cheese and fresh thyme.
- Bake for 20-25 minutes, until crust is golden and cheese is melted and bubbly. Let cool slightly before slicing and serving.
Notes
You can customize the seasonings to taste.