A layered Tex-Mex bake with chicken, tortillas, beans, cheese, and a creamy sauce. This casserole is perfect for weeknight dinners and can be made ahead.
Preheat your oven to 375°F (190°C). Lightly grease a 9×13 inch baking dish.
Heat olive oil in a large skillet over medium heat. Add onion and cook until softened, about 5 minutes. Add garlic and cook for 1 minute more until fragrant.
Stir in the diced green chilies, rinsed black beans, enchilada sauce, sour cream (or Greek yogurt), and shredded chicken. Cook for 5 minutes, stirring occasionally, until heated through.
Spread a thin layer of the chicken mixture on the bottom of the prepared baking dish.
Arrange a layer of tortilla quarters over the chicken mixture.
Spoon about one-third of the remaining chicken mixture over the tortillas.
Sprinkle with about one-third of the shredded Monterey Jack and cheddar cheeses.
Repeat the layers: tortillas, chicken mixture, cheese, ending with a final layer of tortillas and the remaining cheese.
Cover the dish with foil. Bake for 20 minutes.
Remove the foil and bake for another 10-15 minutes, or until the cheese is melted and bubbly and the casserole is heated through.
Let stand for 5-10 minutes before serving. Garnish with optional toppings if desired.
Notes
For a lighter version, use plain Greek yogurt instead of sour cream and low-sodium enchilada sauce.
This casserole can be assembled up to 24 hours in advance. Cover and refrigerate. You may need to add a few extra minutes to the baking time.
To freeze, assemble the casserole but do not bake. Cover tightly with plastic wrap and then foil. Freeze for up to 3 months. Thaw overnight in the refrigerator and bake as directed, adding extra time if needed.