Quick, easy, and SO delicious. This Chicken Fajita Casserole is the BEST healthy dinner recipe! My entire family loves it and it’s a recipe I like to keep on repeat. Made with sliced fajita veggies, flavorful chicken (or rotisserie chicken), a smoky fajita sauce, whole wheat tortilla pieces, beans, spinach, and topped off with cheese and cilantro to your heart’s desire. Throw it in the oven for a melty, savory, incredibly yummy dinner recipe that everyone will love!