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Baking a quiche at home is one of those delightful culinary experiences that can transform a simple meal into a gourmet affair. The rich, buttery crust, filled with a luscious mixture of caramelized onions and mushrooms, creates a dish that is not only satisfying but also visually stunning. Quiche is a versatile dish that can be served at any meal—breakfast, lunch, or dinner—and it has an uncanny ability to impress guests with its sophisticated look and delectable flavors. For those who may feel intimidated by the thought of making a quiche from scratch, the use of a pre-made pie crust offers an easy solution, making this delightful recipe accessible to both novice and experienced cooks alike.

Caramelized Onion & Mushroom Quiche

Discover the irresistible charm of homemade caramelized onion and mushroom quiche! This dish features a flaky pre-made crust filled with sweet, caramelized onions and earthy mushrooms, making it perfect for any meal—breakfast, lunch, or dinner. Easy to prepare and visually stunning, quiche impresses guests with its gourmet appeal. With versatile variations to suit all dietary preferences, you'll love experimenting with this classic recipe. Enjoy the delightful flavors and textures that make every bite a culinary delight!
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Ingredients
  

1 pre-made pie crust (9 inches)

2 tablespoons olive oil

2 large onions, thinly sliced

8 ounces mushrooms, sliced (button or cremini are great choices)

3 large eggs

1 cup heavy cream

1 cup shredded Gruyère cheese

1 teaspoon fresh thyme leaves (or ½ teaspoon dried thyme)

Salt and pepper to taste

Optional: Fresh parsley for garnish

Instructions
 

Preheat the Oven: Begin by preheating your oven to 375°F (190°C). This ensures it reaches the perfect temperature for baking while you prepare the filling.

    Caramelize the Onions: In a spacious skillet, warm the olive oil over medium heat. Add the thinly sliced onions along with a pinch of salt. Cook them slowly, stirring occasionally for approximately 20-25 minutes, or until the onions are beautifully golden brown and caramelized. If you notice the onions starting to stick to the pan, reduce the heat and splash in a bit of water. Once done, remove from heat and set the caramelized onions aside.

      Sauté the Mushrooms: In the same skillet, add a touch more olive oil if necessary. Sauté the sliced mushrooms over medium-high heat until they turn tender and golden, which should take about 5-7 minutes. Season them with salt and pepper to enhance their flavor. Once cooked, mix the sautéed mushrooms with the caramelized onions and fresh thyme. Allow this mixture to cool slightly.

        Prepare the Egg Mixture: In a medium-sized bowl, vigorously whisk together the eggs and heavy cream. Add a pinch of salt and pepper to taste, combining everything until perfectly blended.

          Assemble the Quiche: Carefully place the pre-made pie crust in a 9-inch pie pan. Evenly distribute the caramelized onion and mushroom mixture across the bottom of the crust. Gently pour the egg mixture over the ingredients, ensuring it fills the crust uniformly. Finally, sprinkle the shredded Gruyère cheese generously on top.

            Bake: Transfer the assembled quiche into the preheated oven. Bake for 35-40 minutes, or until the filling is set and the top is lightly golden brown.

              Cool and Serve: Once baked, carefully remove the quiche from the oven and allow it to cool for about 10 minutes. This resting period will make it easier to slice. If desired, garnish with fresh parsley for a pop of color.

                Enjoy: Serve the quiche warm or at room temperature, and enjoy the rich flavors of your homemade caramelized onion and mushroom quiche!

                  Prep Time: 15 minutes | Total Time: 1 hour | Servings: 6-8