01 -
Preheat oven to 175°C and lightly grease a 22x33 cm baking dish.
02 -
In a skillet over medium heat, cook ground beef, chopped mushrooms, and diced onion until the beef is well browned. Drain excess fat.
03 -
In a large bowl, mix the cooked beef mixture, uncooked white rice, cream of mushroom soup, beef broth, sour cream, garlic powder, salt, and black pepper until thoroughly combined.
04 -
Pour the entire mixture into the prepared baking dish and smooth the top using a spatula.
05 -
Cover the dish with foil and bake in the preheated oven for 50 to 60 minutes, or until the rice is tender and liquid is absorbed.
06 -
Remove foil, sprinkle shredded cheddar cheese evenly over the top if using, and return to the oven for an additional 5 minutes until cheese is melted.
07 -
Allow to rest for a few minutes before portioning and serving.