Creating Chicken Enchilada Rice Casserole is a simple task. Follow these steps for a delicious dish:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Cook the Rice: Prepare your rice according to package instructions if you haven’t already.
3. Sauté Onions and Garlic: In a large skillet, heat a little oil over medium heat. Add the chopped onion and sauté until translucent, about 3-4 minutes. Add minced garlic and cook for another minute.
4. Mix Ingredients: In a large bowl, combine the cooked rice, shredded chicken, black beans, corn, half of the shredded cheese, enchilada sauce, cumin, chili powder, paprika, and salt and pepper. Mix well until everything is thoroughly combined.
5. Transfer to Baking Dish: Pour the mixture into a greased 9×13-inch baking dish, spreading it evenly across the bottom.
6. Top with Cheese: Sprinkle the remaining shredded cheese evenly over the top of the casserole.
7. Bake in Oven: Place in the preheated oven and bake for 30-35 minutes, or until bubbly and the cheese is melted and slightly golden.
8. Garnish: Once out of the oven, let it cool for a few minutes. Garnish with fresh cilantro, if desired.
9. Serve: Cut into squares and serve hot.

These steps will guide you through preparing this incredible dish, ensuring every layer is full of flavor.