Preheat your oven to 350°F (175°C) to ensure it’s ready for the casserole.
In a large mixing bowl, combine the cooked shredded chicken (or black beans for a vegetarian version), the rinsed black beans, drained corn, diced bell peppers, diced onion, ground cumin, chili powder, and salt and pepper. Stir thoroughly until everything is well mixed.
Prepare a 9x13 inch baking dish by spreading a thin layer of enchilada sauce across the bottom to prevent sticking.
Start assembling the layers: First, distribute a portion of the tortilla strips over the sauce layer. Next, add half of the chicken and bean mixture evenly over the tortillas, then pour about one-third of the enchilada sauce on top. Finally, sprinkle one cup of shredded cheese over this layer.
Repeat the layering process with the remaining ingredients: add another layer of tortilla strips, followed by the rest of the chicken and bean mixture, pour the remaining enchilada sauce, and finish with the last cup of shredded cheese on top.
Cover the assembled casserole tightly with aluminum foil to keep it moist and bake in the preheated oven for 25 minutes. After this initial baking time, carefully remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbling and has turned a beautiful golden brown.
Once finished baking, take the casserole out of the oven and allow it to cool for about 5 minutes; this will make serving easier.
Optionally, garnish with fresh cilantro before serving. Enjoy this dish warm and savor every cheesy, flavorful bite!
Notes
For a vegetarian option, substitute chicken with black beans.