Preheat the oven to 350 F.
In a large skillet or dutch oven, over medium heat, cook the ground beef, diced onion, and bell peppers until the ground beef is almost cooked through and the veggies start to soften.
Add in the garlic, Italian seasoning, salt, and pepper.
Stir and cook for an additional 2-3 minutes.
Add the diced tomatoes, tomato sauce, Worcestershire sauce, and beef broth.
Bring to a boil.
Stir in the rice.
Cover the dutch oven or transfer the mixture to a casserole dish.
Cover tightly with foil.
Cook for 30 minutes, stirring once, or until the rice is tender.
Remove the oven.
Uncover and top with mozzarella cheese.
Return to the oven and bake 3-5 more minutes, uncovered, until the cheese is melted.
Remove from the oven and let sit for 3-5 minutes to cool.
Garnish with chopped parsley and serve warm.