Preheat oven to 350 degrees f, and spray a 9 x 13 baking dish with non stick cooking spray
Cook ground beef, pork and onion in a large skillet on medium high heat until no longer pink. Remove excess grease if needed
Season meat mixture with salt, garlic powder, pepper and paprika, stir in cooked rice. Set aside
Place half the chopped cabbage on bottom of prepared baking dish
Add meat mixture over cabbage, and top with remaining cabbage
Mix 2 cans tomato soup with 1 can water or broth (1 ½ cups) and pour over casserole, making sure liquid covers cabbage
Cover with aluminum foil and place in preheated oven
Bake for 45 minutes, remove foil, and stir gently to make sure sauce is mixed with casserole
Bake for another 15-20 minutes or until casserole is bubbling and cabbage is tender
Allow to stand for 5 minutes before serving