Description
Indulge in the rich flavors of our French Onion Mushroom Tart, a delightful blend of sweet caramelized onions and savory sautéed mushrooms, all encased in flaky puff pastry. This versatile dish shines as both an appetizer and a main course, making it perfect for gatherings or cozy dinners at home. The impressive presentation, featuring golden pastry and melted cheese, will have your guests coming back for seconds. Plus, with easy preparation and customizable ingredients, this recipe is accessible for cooks of all levels.
Ingredients
Scale
- 1 sheet puff pastry, thawed
- 2 large onions, thinly sliced
- 1 1/2 cups mushrooms (cremini, shiitake, or button), sliced
- 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: Heat butter and olive oil over medium-low heat in a large skillet. Add sliced onions and cook for about 30 minutes until golden brown. Season with sugar, salt, and pepper halfway through.
- Sauté the mushrooms: In the same skillet, add more butter if needed and increase heat to medium. Sauté sliced mushrooms until golden and liquid evaporates (about 10 minutes). Stir in thyme if desired.
- Prepare the puff pastry: Preheat oven to 400°F (200°C). Roll out puff pastry into a rectangle to fit your baking sheet. Place on parchment-lined baking sheet and score a 1-inch border around the edges.
- Assemble the tart: Spread caramelized onions over the pastry within the scored border, top with sautéed mushrooms, sprinkle with cheeses, and brush edges with beaten egg.
- Bake: Cook in preheated oven for 20-25 minutes until golden brown and bubbly. Allow to cool slightly before slicing.
- Prep Time: 20 minutes
- Cook Time: 25 minutes
- Category: Main
- Method: Baking
- Cuisine: French
Nutrition
- Serving Size: 1 slice (100g)
- Calories: 290
- Sugar: 3g
- Sodium: 420mg
- Fat: 18g
- Saturated Fat: 9g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 24g
- Fiber: 2g
- Protein: 7g
- Cholesterol: 40mg