Preheat oven to 350 degrees F (175 degrees C).
In a large bowl, combine the chicken, rice, bell peppers, black beans, tomatoes, taco sauce or salsa, salt, and pepper.
Spread the mixture evenly in a greased 9×13 inch baking dish.
Top with the tortillas, overlapping as needed. Cover with cheese.
Bake in the preheated oven for 20-25 minutes, or until the tortillas are golden brown and the cheese is melted.
Let cool for a few minutes before serving.