Creating your amazing Southwest Chicken Casserole is simple when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Chicken: If not already done, cook and shred your chicken. You can use rotisserie chicken for added convenience.
3. Mix Ingredients: In a large mixing bowl, combine the shredded chicken, corn, black beans, salsa, chili powder, cumin, garlic powder, and cooked rice. Mix thoroughly.
4. Season: Add salt and pepper to taste, making sure all ingredients are well seasoned.
5. Assemble Casserole: Transfer the chicken mixture to a greased 9×13-inch casserole dish. Spread it evenly.
6. Add Cheese: Top the mixture with shredded cheese, ensuring it covers evenly.
7. Bake: Place the casserole in the preheated oven and bake for 35-40 minutes, until the cheese is melted and bubbly.
8. Cool: Remove from the oven and allow to cool for 5-10 minutes before serving.
9. Garnish: Sprinkle chopped green onions on top for added freshness and color before serving.

By carefully following these steps, you’ll create a delicious casserole that’s full of flavor and ready to please.