This tender vegetable quiche is loaded with deliciousness, including onions, spinach and mushrooms. The Parmesan adds extra flavor, providing cheesy scrumptiousness. Sliced tomatoes make a colorful presentation and delicious as well.
1 (9-inch) frozen whole-wheat pie crust (such as Wholly Wholesome)
1 plum tomato, very thinly sliced
1 tablespoon extra-virgin olive oil
1 ½ cups broccoli florets, cut into bite-size pieces
1 ¼ cups chopped red, orange bell peppers
1 cup sliced fresh white mushrooms
2 cups packed baby spinach leaves
¼ cup thinly sliced red onion
1 cup finely grated Parmesan cheese
2 large eggs
⅓ cup whole milk
⅛ teaspoon salt
Preheat oven to 400°F. Thaw pie crust for 10 minutes. Lightly prick bottom and sides of the crust with a fork. Bake for 10 minutes. Let cool for 10 minutes.
Reduce oven temperature to 375°F. Place tomato slices on a paper-towel-lined plate and cover with another paper towel. Press gently to remove moisture, keeping the slices intact; set aside.
Heat oil in a large skillet over medium-high heat. Add broccoli, peppers and mushrooms; cook, stirring frequently, until the vegetables are softening and most of the moisture from the mushrooms has evaporated, 6 to 8 minutes. Add spinach and onion; cook, stirring frequently, until the spinach is wilted and the moisture in the pan has evaporated. Spread the vegetables in a single layer on a paper-towel-lined plate to cool slightly, about 5 minutes.
Sprinkle 1/3 cup Parmesan in the bottom of the cooled crust. Whisk eggs, milk and salt in a medium bowl. Gently pat the slightly cooled vegetables dry with another paper towel and spread them in an even layer over the Parmesan in the crust. Sprinkle another 1/3 cup Parmesan over the vegetables. Carefully pour the egg mixture evenly over the top. Gently wiggle the filled crust to allow the contents to settle. Arrange the tomato slices on top and sprinkle with the remaining 1/3 cup Parmesan.
Bake until set, 25 to 30 minutes. Cool slightly before slicing, about 5 minutes. Serve warm or at room temperature. Enjoy!