Creating this delightful Ground Beef & Rice Casserole is straightforward when you follow these steps:

1. Preheat The Oven: Preheat your oven to 350°F (175°C).
2. Brown The Beef: In a large skillet over medium heat, cook the ground beef until browned. Drain excess fat.
3. Add Vegetables: Stir in the chopped onion, bell peppers, and minced garlic. Cook for about 3-5 minutes, until the vegetables are tender.
4. Combine Ingredients: In a large mixing bowl, combine the cooked beef and vegetables with the uncooked rice, cream of mushroom soup, diced tomatoes (with juice), beef broth, dried oregano, Italian seasoning, salt, and pepper. Mix well until everything is evenly distributed.
5. Transfer to Casserole Dish: Pour the beef and rice mixture into a greased 9×13-inch casserole dish. Spread it evenly.
6. Cover and Bake: Cover the dish with aluminum foil and bake for 30 minutes.
7. Add Cheese: Remove the foil, sprinkle shredded cheese on top, and bake uncovered for an additional 10-15 minutes, or until the cheese is melted and bubbly.
8. Garnish and Serve: Once ready, remove from the oven and let it sit for a few minutes. Garnish with fresh parsley if desired before serving.

These simple steps will lead you to an incredible Ground Beef & Rice Casserole that will impress your family and friends!