Description
These Caramelized Onion Tarts feature a flaky puff pastry base topped with sweet, slow-cooked onions, tangy crumbled feta, and fresh chives. A perfect savory appetizer or elegant snack, these tarts balance rich, savory flavors with a hint of balsamic vinegar for depth. Ideal for entertaining or a lovely addition to any meal.
Ingredients
Scale
Puff Pastry
- ½ batch rough puff pastry or classic puff pastry (or store-bought)
Caramelized Onions
- 3 large onions, sliced thin
- 2 tablespoons olive oil
- ¼ teaspoon salt
- 1 tablespoon balsamic vinegar
Toppings
- 3 ounces crumbled feta (about ¾ cup)
- 1 small bunch of chives, sliced fine
- Egg wash (1 egg whisked with a teaspoon of water)
Instructions
- Prepare the Pastry: Roll out your rough puff or classic puff pastry on a lightly floured surface until about ¼ inch thick. Cut the pastry into 12 equal pieces, suitable for individual tarts. Place them on a parchment-lined baking sheet.
- Caramelize the Onions: Heat olive oil in a wide skillet over medium-low heat. Add the thinly sliced onions and sprinkle with salt. Cook slowly, stirring occasionally, until the onions turn a deep golden brown and become very soft, approximately 40-50 minutes. Towards the end, stir in the balsamic vinegar to add a touch of acidity and depth.
- Assemble the Tarts: Preheat your oven to 400°F (200°C). Brush the edges of each pastry piece with the egg wash. Evenly distribute the caramelized onions over the pastry squares, leaving a small border around the edges. Sprinkle the crumbled feta on top of the onions.
- Bake: Bake the tarts in the preheated oven for about 15-20 minutes, or until the pastry is puffed and golden and the feta is warmed through.
- Garnish and Serve: Remove the tarts from the oven and let them cool slightly. Sprinkle the finely sliced chives over the top for a fresh, mild onion flavor. Serve warm or at room temperature.
Notes
- You can use store-bought puff pastry to save time if you prefer.
- For a milder onion flavor, use sweet onions instead of regular yellow onions.
- Make sure to cook the onions slowly to bring out their natural sweetness without burning.
- The tarts can be assembled ahead of time and baked just before serving.
- Try substituting goat cheese or ricotta for a different cheese variation.
- Prep Time: 30 minutes
- Cook Time: 50 minutes
- Category: Appetizer
- Method: Baking
- Cuisine: European
