Description
Indulge in the rich flavors of a French Onion Mushroom Tart, an exquisite dish that combines caramelized onions and sautéed mushrooms atop a flaky puff pastry crust. This delightful tart serves as a versatile option for any gathering, whether as a stunning appetizer or a satisfying main course. Its layers of savory goodness and impressive presentation make it a crowd favorite, sure to impress even the most discerning palates.
Ingredients
Scale
- 1 sheet puff pastry, thawed
- 2 large onions, thinly sliced
- 1 1/2 cups mushrooms, sliced (cremini, shiitake, or button mushrooms work well)
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 1 teaspoon sugar
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/2 teaspoon fresh thyme leaves (optional)
- 1/2 cup Gruyère cheese, grated
- 1/4 cup Parmesan cheese, grated
- 1 egg, beaten (for egg wash)
Instructions
- Caramelize the onions: In a large skillet, heat butter and olive oil over medium-low heat. Add sliced onions and cook for about 30 minutes until golden brown, stirring occasionally. Season with sugar, salt, and pepper halfway through.
- Sauté the mushrooms: In the same skillet on medium heat, add more butter if needed and sauté sliced mushrooms until golden brown and liquid evaporates (about 10 minutes). Stir in thyme if using.
- Prepare puff pastry: Preheat oven to 400°F (200°C). Roll out puff pastry into a rectangle to fit your baking sheet lined with parchment paper. Score a 1-inch border around edges.
- Assemble the tart: Spread caramelized onions over puff pastry within the border. Top with sautéed mushrooms and sprinkle with Gruyère and Parmesan cheese. Brush edges with beaten egg.
- Bake: Bake for 20–25 minutes until pastry is puffed and golden brown with melted cheese.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Main Course
- Method: Baking
- Cuisine: French
Nutrition
- Serving Size: 1 slice (117g)
- Calories: 250
- Sugar: 3g
- Sodium: 360mg
- Fat: 16g
- Saturated Fat: 8g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 23g
- Fiber: 2g
- Protein: 6g
- Cholesterol: 40mg
Keywords: Use high-quality cheeses for enhanced flavor. Thinly slice onions for even caramelization. Avoid overcrowding mushrooms while sautéing; cook in batches if necessary. Chill puff pastry before baking to achieve maximum flakiness.