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French Onion Mushroom Tart

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Indulge in the warmth and comfort of this French Onion Mushroom Tart, a delightful dish that effortlessly blends buttery puff pastry with sweet caramelized onions and earthy mushrooms. Topped with gooey cheese, this tart is perfect for a cozy dinner or a sophisticated appetizer at your next gathering. With easy preparation steps and versatile ingredient options, you can impress your family and friends without spending hours in the kitchen. Whether enjoyed fresh out of the oven or reheated later, this savory tart is sure to become a cherished favorite!

Ingredients

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

Instructions

  1. Caramelize the onions: In a skillet over medium-low heat, combine butter and olive oil. Add onions and cook for about 30 minutes until golden brown. Stir in sugar, salt, and pepper halfway through.
  2. Sauté the mushrooms: Increase heat to medium and add sliced mushrooms to the skillet. Cook for about 10 minutes until golden brown; stir in thyme if using.
  3. Prepare puff pastry: Preheat oven to 400°F (200°C). Roll out puff pastry to fit a parchment-lined baking sheet and score a 1-inch border around the edges.
  4. Assemble the tart: Spread caramelized onions on the pastry base, followed by sautéed mushrooms and cheeses. Brush edges with beaten egg.
  5. Bake: Bake for 20-25 minutes until puffed and golden brown. Allow to cool slightly before slicing.

Nutrition

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