Caramelized Onion & Mushroom Quiche anyone? #sponsored This quiche features a buttery, flaky pie crust that is filled with a milk and egg custard made with egglandsbest Eggs, caramelized mushrooms and onions, and a sharp cheddar cheese blend. Want to make it? Get the recipe below! . . Recipe: (1) 9" deep-dish frozen pie crust *or your favorite crust 2 tablespoons extra virgin olive oil 1 medium onion diced 6 ounces sliced mushrooms washed and patted dry ½ teaspoon dry or fresh thyme 3 large eggs 2 large egg yolks 1 cup whole milk 4 ounces sharp white cheddar freshly shredded4 ounces sharp yellow cheddar freshly shredded salt & pepper to taste. . . Instructions: . . Preheat oven to 350 degree F. Heat up olive oil in a large frying pan over medium heat. Add chopped onions, mushrooms, salt and pepper. Stir occasionally until they start browning (watch closely so they don’t burn). Mine took about 15 minutes total before I removed them from the heat. In a large bowl, add the eggs, yolks, ...