Description
Indulge in the rich flavors of this Caramelized Onion and Gruyère Tart, a savory French-inspired appetizer that pairs sweet caramelized onions with nutty Gruyère cheese on a flaky puff pastry crust.
Ingredients
Scale
Puff Pastry:
- 1 sheet frozen puff pastry, thawed
Caramelized Onions:
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 3 large yellow onions, thinly sliced
- 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1 teaspoon balsamic vinegar
Cheese:
- 1 cup shredded Gruyère cheese
- 1/4 cup grated Parmesan cheese
Egg Wash:
- 1 egg, beaten
Instructions
- Preheat Oven: Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
- Caramelize Onions: In a skillet, melt butter and olive oil. Add onions, thyme, salt, and pepper. Cook slowly until caramelized. Stir in balsamic vinegar.
- Prepare Pastry: Roll out puff pastry, score a border, brush with egg wash.
- Assemble Tart: Spread caramelized onions inside border, top with cheeses.
- Bake: Bake for 18-20 minutes until golden brown.
- Serve: Let cool before slicing and serving.
Notes
- For added flavor, sprinkle tart with fresh thyme or arugula.
- Can be served warm or at room temperature.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Appetizer
- Method: Baking
- Cuisine: French
Nutrition
- Serving Size: 1 slice
- Calories: 280
- Sugar: 5 g
- Sodium: 310 mg
- Fat: 18 g
- Saturated Fat: 10 g
- Unsaturated Fat: 6 g
- Trans Fat: 0 g
- Carbohydrates: 21 g
- Fiber: 2 g
- Protein: 9 g
- Cholesterol: 40 mg
