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Tory - French Onion and Mushroom Tart with Gruyere Cheese - Image 2

Tory's French Onion and Mushroom Tart with Gruyere Cheese

A savory tart featuring caramelized onions, mushrooms, and Gruyere cheese in a flaky crust. Perfect as an appetizer or light meal.
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Prep Time 30 minutes
Cook Time 45 minutes
Total Time 1 hour 15 minutes
Servings: 6 servings
Course: Appetizer
Cuisine: French
Ingredients Equipment Method Notes

Ingredients
  

  • 1 sheet puff pastry thawed if frozen
  • 2 large onions thinly sliced
  • 8 oz mushrooms sliced
  • 2 tbsp butter
  • 1 tbsp olive oil
  • 2 tsp fresh thyme chopped
  • 1 cup Gruyere cheese shredded
  • 1 large egg beaten, for egg wash

Equipment

  • Baking sheet
  • Parchment paper
  • Rolling Pin
  • Large skillet
  • Pastry brush

Method
 

  1. Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
  2. Roll out the puff pastry sheet on a lightly floured surface to about 1/8 inch thickness. Transfer it to the prepared baking sheet.
  3. In a large skillet, melt the butter and olive oil over medium heat. Add the sliced onions and cook, stirring occasionally, until they are caramelized and golden brown, about 20-25 minutes.
  4. Add the sliced mushrooms to the skillet with the onions. Cook for an additional 5-7 minutes until the mushrooms are tender. Season with salt, pepper, and fresh thyme.
  5. Spread the onion and mushroom mixture evenly over the puff pastry, leaving a 1-inch border around the edges.
  6. Sprinkle the shredded Gruyere cheese over the onion and mushroom mixture.
  7. Brush the edges of the puff pastry with the beaten egg to create a golden crust.
  8. Bake in the preheated oven for 25-30 minutes, or until the pastry is puffed and golden brown, and the cheese is melted and bubbly.
  9. Allow the tart to cool for a few minutes before slicing and serving.

Notes

Chef's Tips:
• For best results, caramelize the onions slowly over low heat to develop deep flavor.
• Avoid overworking the puff pastry to prevent it from becoming tough.
• Serve with a light salad for a complete meal.
Food Safety:
• Ensure the tart reaches an internal temperature of 165°F (74°C) to ensure food safety.
• Store leftovers in the refrigerator within two hours of cooking.