This casserole comes together in stages, starting with cooking the rice and preparing the beef mixture separately before combining them. Follow the steps carefully to ensure each component is properly seasoned and cooked before assembling the final dish.

1. Step 1

   Preheat oven to 375°F. Spray a 9x13 inch baking dish with cooking spray.

2. Step 2

   In a medium saucepan, combine rice with 4 cups chicken broth. Bring to a boil, reduce heat, cover, and simmer for 18 minutes until rice is tender.

3. Step 3

   While rice cooks, heat a large skillet over medium-high heat. Add ground beef and cook until browned, breaking it up with a wooden spoon, about 8 minutes.

4. Step 4

   Add diced onion, bell pepper, and garlic to the beef. Cook until vegetables are softened, about 5 minutes.

5. Step 5

   Stir in taco seasoning, diced tomatoes, black beans, corn, and green chilies. Simmer for 5 minutes.

6. Step 6

   Combine the cooked rice with the beef mixture in the large skillet, stirring well to combine.

7. Step 7

   Transfer the mixture to the prepared baking dish. Top evenly with shredded cheese.

8. Step 8

   Bake uncovered for 20 minutes until cheese is melted and bubbly.

Let the casserole rest for 5-10 minutes before serving. Garnish with optional toppings like fresh cilantro, diced avocado, or a dollop of sour cream if desired. Leftovers can be stored in an airtight container in the refrigerator for up to 4 days.