Crustless quiche makes a great alternative to traditional quiche, because you get all the flavor and nutrition of the filling without the extra calories, grains and carbs from the crust. Even gluten-free crusts are often high in carbs and not very healthy.
I use this recipe for the filling - https://www.pinterest.com/pin/198017714844658991/ , Double the recipe made 2 and 2/3 muffin pans of quiches. Bake for 30 min at 350 deg. Don't need to oil in between all the filo pastry sheets. Can add sprinkle of parmesan on top.
Avocado bacon crustless quiche - an easy, healthy recipe for breakfast, lunch, or dinner. This would also be a great portable snack for pack lunch boxes and picnics , a great alternative to sandwiches.