Description
These Caramelized Onion Tarts are a delicious and savory treat perfect for gatherings or as an elegant appetizer. Featuring sweet, slow-cooked onions with tangy feta cheese on a flaky puff pastry crust, these tarts combine rich flavors and a satisfying texture for a crowd-pleasing dish that’s both simple and impressive.
Ingredients
Scale
Puff Pastry
- ½ batch rough puff pastry or classic puff pastry (or store-bought)
Filling
- 3 large onions, sliced thin
- 2 tablespoons olive oil
- ¼ teaspoon salt
- 1 tablespoon balsamic vinegar
- 3 ounces crumbled feta (about ¾ cup)
Topping
- Egg wash (1 egg whisked with a teaspoon of water)
- 1 small bunch of chives, sliced fine
Instructions
- Prepare the Onions: Heat olive oil in a large skillet over medium heat. Add thinly sliced onions and sprinkle with salt. Cook slowly, stirring occasionally, until the onions become soft and golden brown, about 30-40 minutes. Towards the end of cooking, stir in the balsamic vinegar and cook for another 2 minutes to develop a rich, caramelized flavor.
- Preheat Oven: Preheat your oven to 400°F (200°C) to prepare for baking the tarts.
- Roll Out Pastry: On a lightly floured surface, roll out the puff pastry to your desired thickness and cut into 12 equal rectangles or squares for individual tarts. Place them on a parchment-lined baking sheet.
- Assemble Tarts: Evenly distribute the caramelized onions over each piece of pastry, leaving a small border around the edges. Sprinkle the crumbled feta cheese on top of the onions.
- Apply Egg Wash: Brush the edges of the pastry with the egg wash to ensure a golden and glossy finish once baked.
- Bake: Bake the tarts in the preheated oven for 15-20 minutes or until the pastry is puffed and golden brown.
- Garnish and Serve: Remove from the oven and sprinkle finely sliced chives over each tart. Serve warm or at room temperature for best flavor and texture.
Notes
- Use store-bought puff pastry for convenience, or make homemade for a flakier texture.
- Caramelizing onions is key to the tart’s sweetness and depth of flavor; cook them slowly for best results.
- Feta cheese can be substituted with goat cheese or ricotta for a different flavor profile.
- To make these tarts ahead, assemble but bake just before serving to keep puff pastry crisp.
- These tarts pair wonderfully with a fresh salad or as part of a brunch spread.
