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Leek, Mushroom and Gruyère Quiche

Freezing and re-heating tip: Prepare and bake this quiche according to the recipe instructions below and allow to cool for about 30-45 minutes. Wrap securely in aluminum foil and freeze. When ready to re-heat, let the quiche thaw for about 20 minutes and preheat your oven to 400 degrees. When ready, bake for about 20 to 25 minutes or until warmed through and browned on top.
Prep Time20 mins
Cook Time45 mins
Total Time1 hr 5 mins
Course: Main
Servings: 6 to 8
Author: Hip Foodie Mom


For the crust:

  • cups all-purpose flour
  • ¾ teaspoon sea salt
  • 1 stick 1/2 cup very cold unsalted butter; cubed and immediately added
  • ¼ cup cold ice water

For the filling:

  • 2 tablespoons extra virgin olive oil
  • 1 medium-sized leek diced (using only the white and tender green part towards the bottom)
  • 3 to 4 cups cremini or baby portobello mushrooms sliced
  • 2 cloves garlic minced
  • 1 teaspoon fresh rosemary finely chopped
  • 1 teaspoon fresh sage finely chopped
  • kosher salt
  • freshly ground black pepper
  • 1/4 cup dry white wine or chicken stock
  • 3 large eggs
  • 1/2 cup heavy cream
  • 1 cup Gruyère cheese freshly grated
  • 2 tablespoons fresh parsley finely chopped
  • 1 teaspoon fresh thyme leaves only

Special equipment needed:

  • food processor or pastry blender or you could even use a fork
  • rolling pin
  • tart baking pan


  • Using your food processor, combine the flour, salt and butter and pulse for about 5 seconds. Sprinkle the ice water over the flour mixture and pulse until the pastry dough just begins to come together, for about 10 to 15 seconds; you should still be able to see small pieces of butter in it.
  • Transfer the pastry dough to a lightly floured work surface, gather it together to combine everything and roll out to a 12 inch circle. Transfer the dough to a tart pan (I highly recommend the ones with removable bottoms) and refrigerate while you prepare the filling (You can also roll out the dough and use it right away if needed).
  • Preheat your oven to 400 degrees. Heat the olive oil in a large sauté pan over medium-high heat. After a minute or two, add the leeks and cook for about 3 minutes until softened.
  • Add the mushrooms, garlic, rosemary and sage and season with salt and pepper. Cook for about 5 minutes, stirring occasionally.
  • Add the white wine (or chicken stock) and stir to pick up the lovely browned bits on the bottom of your pan. Let the wine cook for about a minute or 2. Remove the pan from the heat and allow to cool slightly. Remove your pastry crust from the refrigerator and set aside.
  • Using a medium-sized mixing bowl, whisk together the eggs, heavy cream, Gruyère, parsley and thyme. Fill the tart pan with the cooled mushroom mixture. You can smooth down so it evenly fills the pan. Pour in the egg mixture over the mushrooms and leeks. Spread evenly again and sprinkle on a little more chopped fresh parsley if desired.
  • Bake for about 25 to 30 minutes or until cooked through and the quiche is a nice golden brown. Let cool for at least 15 to 20 minutes before serving.