Ingredients:
- 4 large onions, thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon butter
- 2 teaspoons balsamic vinegar
- 1 teaspoon sugar
- Salt and pepper, to taste
- 1 sheet of puff pastry (thawed if frozen)
- 1/4 cup grated Parmesan cheese
- Fresh thyme (optional)
Instructions:
- Caramelize the onions:
- Heat olive oil and butter in a large pan over medium heat.
- Add the sliced onions and stir to coat them evenly.
- Cook the onions for 20-30 minutes, stirring occasionally. Lower the heat if they begin to brown too quickly.
- Add balsamic vinegar, sugar, salt, and pepper in the last 5 minutes to balance the sweetness and add a rich flavor. Stir and cook until the onions are deeply golden and caramelized. Set aside.
- Prepare the puff pastry:
- Preheat the oven to 400°F (200°C).
- Roll out the puff pastry sheet on a lightly floured surface and cut it into squares or circles, depending on your preference.
- Place the puff pastry pieces on a lined baking sheet.
- Assemble the tartlets:
- Spoon the caramelized onions onto each puff pastry square or circle, leaving a small border around the edges.
- Sprinkle a little grated Parmesan cheese over the top.
- Optionally, top with fresh thyme leaves for an herbaceous note.
- Bake:
- Bake in the preheated oven for 12-15 minutes, or until the puff pastry is golden and crispy.
- Serve:
- Serve warm as an appetizer or alongside a salad. Enjoy the rich, sweet flavor of the caramelized onions!
Why You’ll Love This:
These tartlets make onions taste absolutely indulgent, and the buttery, crispy puff pastry elevates the dish to something special. You’ll be coming back for more every time!
