Preheat your oven to 350°F (175°C) and grease a 9x13 inch casserole dish.
In a large skillet over medium heat, add olive oil. Once hot, sauté the diced onion until translucent (about 5 minutes). Add minced garlic and cook for another minute until fragrant.
Add the ground beef to the skillet. Cook until browned, breaking it apart with a spoon. Drain excess grease if necessary.
Stir in the condensed cheddar cheese soup, beef broth, uncooked rice, onion powder, garlic powder, salt, and pepper. Mix until well combined.
Fold in the frozen mixed vegetables and half of the shredded cheddar cheese into the mixture.
Pour the mixture into the prepared casserole dish, spreading it evenly.
Top with the remaining shredded cheddar cheese.
Cover the casserole dish with foil and bake in the preheated oven for 30 minutes.
After 30 minutes, remove the foil and bake for an additional 15-20 minutes, or until the cheese is bubbly and the rice is cooked through.
Let the casserole cool for 5 minutes before serving to allow it to set.
Notes
Serve hot, garnished with freshly chopped parsley or green onions for a pop of color. Pair with a side salad for a complete meal.