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French Onion Mushroom Tart

French Onion Mushroom Tart
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Indulge in the comforting flavors of this French Onion Mushroom Tart, a delightful dish that combines the sweetness of caramelized onions with the earthiness of sautéed mushrooms, all nestled in a flaky puff pastry crust. This versatile tart is perfect for busy weeknights or special gatherings and promises to impress both family and guests alike. With its rich flavors and beautiful presentation, it’s sure to become a favorite in your meal rotation. Enjoy each bite as you savor the melty cheese and aromatic herbs that elevate this dish to gourmet status!

Ingredients

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  • 1 sheet puff pastry, thawed
  • 2 large onions, thinly sliced
  • 1 1/2 cups sliced mushrooms (cremini, shiitake, or button)
  • 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 grated Gruyère cheese
  • 1/4 cup grated Parmesan cheese
  • 1 egg, beaten (for egg wash)

Instructions

  1. Caramelize the onions: In a skillet over medium-low heat, melt butter and olive oil. Add sliced onions and cook slowly for about 30 minutes until golden brown. Stir in sugar halfway through.
  2. Sauté the mushrooms: In the same skillet, increase heat to medium and add more butter if needed. Cook mushrooms until golden brown and liquid evaporates (about 10 minutes). Stir in fresh thyme if using.
  3. Prepare puff pastry: Preheat oven to 400°F (200°C). Roll out puff pastry on a floured surface into a rectangle fitting your baking sheet. Place on parchment-lined sheet and score a border.
  4. Assemble the tart: Spread caramelized onions on pastry within the border, then add sautéed mushrooms on top. Sprinkle cheeses and brush edges with beaten egg.
  5. Bake: Bake for 20–25 minutes or until pastry is golden brown and cheese is bubbly.

Nutrition

Find it online: https://easywithella.com/french-onion-mushroom-tart/