This vegan quiche recipe is simple to make, healthy, and versatile while keeping with the taste and texture you expect from the breakfast staple of quiche. Feel free to use whatever veggies and vegetarian meat that suits your palate, and, if you're hosting a party, consider mini quiches, either in small tartlet pans or muffin tins. Vegan quiche will keep for 3-4 days in an airtight container individually wrapped in the refrigerator but up to 3 months frozen in the freezer. Reheating is a breeze with a microwave. Be sure the food is brought to above 165 f internally when reheated and eaten immediately after reheating to maintain food safety standards.