Creating a mouthwatering Ground Beef Casserole with Brown Rice is easy when you follow these straightforward steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Brown the Beef: In a large skillet over medium heat, add the ground beef. Cook until browned, usually about 5-7 minutes. Make sure to break up the meat with a spatula as it cooks.
3. Add Onions and Peppers: Stir in the chopped onions and bell peppers to the skillet. Cook until softened, approximately 3-5 minutes.
4. Mix Ingredients: Add the uncooked brown rice, canned tomatoes (with juice), beef broth, garlic powder, onion powder, Italian seasoning, paprika, salt, and pepper. Stir to combine all the ingredients evenly.
5. Add Frozen Vegetables: Gently fold in the frozen mixed vegetables. This adds color and nutrients to your casserole.
6. Transfer to Baking Dish: Pour the mixture into a greased 9×13 inch baking dish, spreading it evenly.
7. Cover with Foil: Tightly cover the baking dish with aluminum foil to retain moisture while baking.
8. Bake: Place the covered dish in the preheated oven and bake for 30 minutes.
9. Uncover and Add Cheese: After 30 minutes, remove the foil and sprinkle the shredded cheddar cheese evenly over the top.
10. Bake Again: Return the dish to the oven uncovered and bake for an additional 15-20 minutes, or until the cheese is bubbly and slightly golden brown.
11. Let Cool: Remove the casserole from the oven and let it cool for 5-10 minutes before serving to let the flavors meld.
12. Garnish and Serve: Optionally, garnish with fresh herbs before serving.

Following these simple steps will yield a delicious, comforting casserole that your entire family will love.