01 -
Set the oven temperature to 175°C to prepare for baking.
02 -
In a large skillet over medium heat, cook ground beef with chopped onion until caramelized and fully browned.
03 -
Incorporate the rice and canned diced tomatoes with green chiles into the skillet mixture, stirring to combine evenly.
04 -
Pour in beef broth, then season with salt, black pepper, and garlic powder. Bring the mixture to a gentle boil.
05 -
Transfer the mixture to a greased baking dish, cover with aluminum foil, and bake for 25 minutes.
06 -
Remove foil, evenly sprinkle shredded cheddar on top, and bake uncovered for an additional 10 minutes until cheese is melted and golden.
07 -
Allow casserole to rest for 5 minutes off heat before portioning and serving.