Description
Indulge in the rich and savory flavors of this Caramelized Onion Tart, where golden-brown onions mingle with gooey Gruyère and Parmesan cheeses on a flaky puff pastry base. A French-inspired dish that’s perfect as an appetizer or a light main course.
Ingredients
Scale
Puff Pastry:
- 1 sheet puff pastry, thawed
Caramelized Onions:
- 2 tablespoons unsalted butter
- 2 tablespoons olive oil
- 3 large yellow onions, thinly sliced
- 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)
- 1 teaspoon balsamic vinegar
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
Cheese Topping:
- 1 cup shredded Gruyère cheese
- 1/4 cup grated Parmesan cheese
Additional:
- 1 large egg, beaten (for egg wash)
- Fresh parsley for garnish
Instructions
- Preheat the oven: Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
- Caramelize the onions: In a large skillet, heat butter and olive oil. Add onions and cook slowly until golden brown. Stir in thyme, balsamic vinegar, salt, and pepper, then remove from heat.
- Prepare the pastry: Roll out puff pastry on the baking sheet. Score a border, brush with egg wash.
- Assemble the tart: Spread caramelized onions inside the border, sprinkle with cheeses.
- Bake: Bake for 20-25 minutes until golden and puffed.
- Serve: Garnish with parsley, slice, and serve warm.
Notes
- For a richer flavor, add cooked bacon slices on top before baking.
- This tart pairs well with a simple green salad.
Nutrition
- Serving Size: 1 slice
- Calories: 310
- Sugar: 6 g
- Sodium: 360 mg
- Fat: 20 g
- Saturated Fat: 10 g
- Unsaturated Fat: 9 g
- Trans Fat: 0 g
- Carbohydrates: 26 g
- Fiber: 2 g
- Protein: 8 g
- Cholesterol: 45 mg
