In a large pot, Dutch oven, or deep skillet, brown your ground beef with your diced onion over medium-high heat. Once the beef is cooked through drain off and discard any excess grease.
Add the minced garlic and diced pepper bells and cook until the garlic is fragrant and the peppers are soft. about 5 minutes. Add the Italian seasoning, salt, and pepper, and stir to combine.
Then add the tomato sauce and diced tomatoes, and stir. Add the soy sauce(or Worcestershire sauce) and the beef broth.
Bring the mixture to a boil, stirring often. Once the mixture is boiling, add the rice, stir, and reduce the heat, to medium-low.
Allow the mixture to simmer, stirring occasionally, until the rice is completely cooked and has soaked up most of the liquid in the pan. About 15 minutes.
Remove the pan from the heat and add 1 1/2 cups of the shredded cheese, and stir until the cheese is completely melted.
Now, there are a couple of ways to finish your casserole. You can either sprinkle the remaining cheese over your rice mixture. Cover and allow the cheese to melt, about 1 minute, and serve.
Or you can transfer your rice mixture to a casserole dish, sprinkle your remaining cheese over the top, and pop your casserole into the oven. I love doing this, as it makes the cheese perfectly melted and golden brown. But you can easily do whatever works best for you!
Serve and enjoy!