Description
This French Onion and Mushroom Tart with Gruyere Cheese is a savory delight that transports you to the charming cafés of France with every delicious bite.
Ingredients
Scale
- 1 sheet puff pastry (14 oz), thawed
- 12 oz cremini or shiitake mushrooms, sliced
- 2 medium yellow onions, thinly sliced
- 1¼ cups grated Gruyere cheese
- ¼ cup dry sherry
- ¼ cup beef or vegetable stock
- 3 tbsp ghee or unsalted butter, divided
- 2 cloves garlic, minced
- 1 tbsp fresh thyme leaves, divided
- 1 large egg, whisked
- Salt and black pepper, to taste
Instructions
- Heat 1½ tablespoons of ghee in a large skillet over medium heat. Add the onions, season with salt and pepper, and caramelize for about 20 minutes until golden brown. Pour in dry sherry and add the stock, simmering until thick.
- Add the remaining ghee to the same skillet and sauté mushrooms for 5-7 minutes. Add garlic and thyme at the end, then drain excess moisture.
- Preheat your oven to 400°F (200°C). Roll out puff pastry to 10 by 13 inches and score a ½-inch border. Prick holes in the center.
- Scatter ¾ cup Gruyere on the pastry, layer caramelized onions and mushrooms, and top with remaining Gruyere. Brush edges with whisked egg.
- Bake for 26-30 minutes until golden brown. Rest for 10 minutes before serving and garnish with thyme.
Notes
Serve warm for best flavor, paired with a green salad and white wine.
- Prep Time: 30 minutes
- Cook Time: 40 minutes
- Category: Appetizer
Nutrition
- Calories: 350 kcal
- Sodium: 550 mg
- Protein: 10 g