Preheat the oven to 350°F. Lightly oil a 9x13-inch baking dish.
Cook the rice according to the package directions and set aside.
In a large skillet over medium heat, add the olive oil, then sauté the onion until soft. Add garlic and cook for 1 minute.
Add ground beef to the skillet and cook until browned. Season with salt and pepper.
Stir in the cream of mushroom soup, diced tomatoes, and beef broth. Let simmer for 5 minutes.
Add the cooked rice to the beef mixture and stir until well combined.
Transfer the mixture to the prepared baking dish. Sprinkle cheddar cheese evenly over the top.
Bake for 20 minutes or until the cheese is melted and bubbly.
Let cool slightly before serving.