In a medium pan, brown the ground beef. Drain off any fat. Empty into greased casserole dish.
In the same pan, add 2 tablespoons butter. Saute the onion, carrots, and cabbage until soft and translucent. Season with paprika, garlic powder, and salt and pepper to taste. Add the rice. Stir well. Remove and empty into casserole dish with the beef.
Mix the tomato soup with 1-2 cans of heavy cream (as creamy as you’d like it) and pour over casserole. Give it a good stir.
Bake casserole for 45 minutes. After 45 minutes, top with Mozzarella cheese and bake an additional 10-15 minutes.