1-Preheat oven and prepare crust: Getting started with asparagus spinach feta quiche is fun and straightforward. Begin by preheating your oven to 375°F (190°C). This step ensures your quiche bakes evenly and comes out with a golden top. Line a 9-inch pie plate with the pie crust and pop it in the freezer while you work on the filling.

2-Sauté vegetables: Next, heat the olive oil in a large skillet over medium heat. Add the asparagus pieces and spinach, cooking until the asparagus is just tender and the spinach wilts down. Once done, transfer the spinach to a colander and press out any extra moisture to keep your quiche from getting soggy.

3-Mix and assemble: In a bowl, whisk together the eggs, milk, feta cheese, mozzarella cheese, salt, and pepper until everything mixes well. Now, take the pie crust out of the freezer and spread the asparagus, spinach, and green onions evenly inside. Pour the egg mixture over the top, making sure it covers everything nicely.

4-Bake and rest: Bake it for about 45 minutes until the quiche sets and turns a light golden color. Let it rest for 15 minutes before you slice it, as this helps the flavors settle and makes serving easier.