This easy chicken enchilada casserole is very flexible and will happily accept whatever ingredients you have on-hand. Don't have refried beans? Use black beans instead. Trying to cut down on your grocery bill? Chicken thighs will work instead of breasts. This protein and fiber-packed dish will cure what ails you. It's comfort food that loves you back. I've recently posted two different recipes for enchilada sauce: one super easy sauce, and one somewhat traditional sauce. Use whichever of these you like best, or feel free to use a non-processed canned sauce with no preservatives. As long as you enjoy yourself, I'm happy! And did I mention that it's totally, completely, and naturally gluten-free?