Preheat your oven to 375°F and spray a 9×13-inch baking dish with cooking spray.
In a large skillet, cook the lean ground beef and diced onion over medium-high heat for about 7-8 minutes until thoroughly cooked. Drain excess grease.
Add the minced garlic to the skillet and cook for 30 seconds while stirring.
Sprinkle in the chili powder, ground cumin, smoked paprika, dried oregano, salt, and black pepper. Cook for 1 minute until fragrant.
Stir in the uncooked rice, diced tomatoes, chopped green chilies, and beef broth. Mix evenly.
Pour the mixture into the prepared baking dish, cover with foil, and bake for 45-50 minutes.
Remove the foil, fluff the rice, and sprinkle shredded cheese over the top. Bake uncovered for an additional 8-10 minutes until the cheese melts.
Let the casserole rest for 5 minutes before serving.