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Butternut Squash and Mushroom Puff Pastry Tart

This delectable butternut squash and mushroom puff pastry tart combines the savory essence of vegetables and herbs with the lightness of golden, flaky pastry. Ideal for serving as an appetizer, main course, or side dish, this savory tart is sure to be a crowd-pleaser.
Prep Time 30 minutes
Cook Time 40 minutes
Total Time 1 hour 10 minutes
Course Side Dish
Cuisine American
Servings 12 People

Ingredients
  

  • Ingredients
  • Dough
  • 1 lb of homemade rough puff pastry or 2 sheets of thawed store-bought frozen puff pastry
  • 1 large egg beaten with 1 tablespoon of water or milk (for egg wash)
  • Topping
  • 2 tablespoons olive oil
  • 2 cups peeled and sliced butternut squash approximately 1/4 inch thick
  • 1 and 1/4 cups sliced or roughly chopped mushrooms
  • 1/2 cup sliced onion about half of a medium onion
  • 3 garlic cloves minced
  • 1/4 teaspoon salt
  • Freshly ground black pepper to taste (plus extra for garnish)
  • 2 teaspoons fresh thyme leaves or 1 teaspoon dried thyme
  • 2 teaspoons chopped fresh rosemary or 1 teaspoon dried rosemary
  • Pinch of ground nutmeg
  • 1 cup shredded parmesan cheese
  • Optional for garnish: flaky sea salt additional cheese, fresh thyme, and rosemary

Instructions
 

  • Instructions
  • Prepare the Dough: If making your own rough puff pastry, complete the second refrigeration step. If using store-bought puff pastry, ensure it is thoroughly thawed. Keep the dough refrigerated until ready to assemble the tart.
  • Prepare the Topping: Heat olive oil in a large skillet over medium-low heat. Add the butternut squash and cook for about 5 minutes, stirring occasionally. Then, add the mushrooms, onion, garlic, salt, pepper, thyme, rosemary, and nutmeg. Continue cooking until the vegetables are tender, approximately 5-6 minutes. Remove from heat and set aside.
  • Preheat the Oven: Set the oven temperature to 400°F (204°C). Prepare a large baking sheet by lining it with parchment paper or a silicone baking mat.
  • Assemble the Tart: On a lightly floured surface, roll out the pastry dough into a 10×16-inch rectangle. If using store-bought dough, overlap the edges of the two sheets, then roll them out into the desired shape. Carefully transfer the dough to the prepared baking sheet. If necessary, reshape the dough with your hands. Fold over the edges about 1/2 inch and crimp with a fork. For easier crimping, chill the dough in the refrigerator for 10 minutes before proceeding.
  • Egg Wash and Layering: Brush the pastry dough with the egg wash, ensuring to coat both the edges and surface. Use a fork to poke small holes in the dough, avoiding the crimped edges. Sprinkle 3/4 cup of parmesan cheese over the dough, followed by the vegetable mixture. Arrange the vegetables evenly across the surface.
  • Bake the Tart: Place the tart in the oven and bake for 30 minutes. Once done, sprinkle the remaining parmesan cheese on top of the tart. Return the tart to the oven for an additional 5-8 minutes or until the cheese has melted and the pastry is golden brown.
  • Finish and Serve: Remove from the oven and, if desired, garnish with flaky sea salt, extra pepper, or additional cheese and herbs. Slice and serve warm or at room temperature.
  • Storage: Leftovers can be stored in the refrigerator for up to five days. To reheat, warm in the microwave or cover and bake at 300°F (149°C) for 10-15 minutes.
Keyword Butternut Squash and Mushroom Puff Pastry Tart