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Savory Onion and Mushroom Tart
Dive into the exquisite flavors of this Savory Onion and Mushroom Tart, where the sweet, caramelized onions meet the earthy richness of sautéed mushrooms, all enveloped in a crispy, flaky puff pastry. This tart is not just a dish; it's a celebration of simple ingredients elevated to gourmet status. The Gruyere cheese adds a touch of opulence, while fresh thyme and a splash of balsamic vinegar infuse the filling with depth and complexity. Originating from the heart of French cuisine, tarts like this have been a beloved staple for centuries, often served at gatherings as both an appetizer and a stunning centerpiece. Perfect for brunch or as a delightful starter, this dish promises to impress your guests and tantalize your taste buds. Pair it with a crisp green salad or a light soup for a complete and satisfying meal.
Ingredients
- Puff pastry
- 1 sheet, thawed
- Olive oil
- 2 tablespoons
- Onions
- 2 large, thinly sliced
- Mushrooms
- 8 ounces, sliced (cremini or button mushrooms work well)
- Balsamic vinegar
- 1 tablespoon
- Fresh thyme
- 1 teaspoon, chopped (or 1/2 teaspoon dried thyme)
- Salt
- 1/2 teaspoon, or to taste
- Black pepper
- 1/4 teaspoon, or to taste
- Gruyere cheese
- 1 cup, grated
- Egg
- 1, beaten (for egg wash)
Instructions
- Preheat the oven to 400°F (200°C).
- In a large skillet, heat the olive oil over medium heat. Add the thinly sliced onions and sauté until they turn a deep golden brown and caramelized, about 15 minutes, stirring occasionally to prevent burning.
- Add the sliced mushrooms to the skillet, along with the balsamic vinegar, fresh thyme, salt, and pepper. Cook for another 5 minutes, stirring frequently, until the mushrooms are tender and the vinegar has reduced slightly.
- On a lightly floured surface, roll out the puff pastry to fit a 9-inch tart pan. Carefully transfer the pastry to the tart pan, pressing it into the edges and trimming any excess pastry from the edges.
- Spread the caramelized onion and mushroom mixture evenly over the pastry base.
- Sprinkle the grated Gruyere cheese generously on top of the filling.
- Brush the edges of the pastry with the beaten egg to achieve a golden, glossy finish.
- Bake in the preheated oven for 20-25 minutes, or until the pastry is golden brown and the cheese is melted and bubbly.
- Remove from the oven and allow the tart to cool slightly before slicing into wedges. Serve warm or at room temperature.
Tips
- For an extra layer of flavor, consider adding a pinch of nutmeg to the onion and mushroom mixture.
- You can substitute Gruyere cheese with other cheeses such as feta or goat cheese for a different flavor profile.
- Add a handful of spinach or kale to the filling for added nutrition and color.
Dietary Information
Servings: 6 Dish Type: Appetizer Prep Time: 20 minutes Cook Time: 25 minutes Calories: 320 Fat: 22g Carbs: 25g Protein: 8g Sodium: 450mg Sugar: 3g
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