*Follow Your Heart Cheddar Shreds is a great brand of dairy-free and vegan cheese. Alternatively, use Daiya. To make two to three days in advance, without freezing, fully bake the crust as indicated in the crust recipe, fill it and bake it as directed above. Cool and cover with plastic wrap. The crust will turn out perfectly by the second day. If you serve it the same day, the crust will be too dry.
https://glutenfreerecipebox.com/gluten-free-loaded-mashed-potato-quiche-with-caramelized-onion/