Bring a large stock pot of water to boil. Add the whole head of cabbage and boil for 5 minutes. Remove to a colander to drain and cool.
Once cooled, cut 1/2 inch off the stem end of the cabbage. Carefully remove 12 leaves and cut the tough rib out of the stem end in the shape of a V.
In a large skillet, heat olive oil over medium heat. Add the onion and cook for 2-3 minutes, stirring several times. Reduce heat to low and add garlic. Cook for 1 minute, stirring constantly.
Add the tomato sauce, diced tomatoes, cider vinegar, and brown sugar. Season with salt and pepper to taste. Simmer for 10 minutes.
Spoon a thin layer of the tomato sauce into a 9 x 13-inch casserole dish. In a large bowl, mix the ground pork sausage, ground beef, onion, garlic, egg, rice, parsley, and paprika.
Place about 1/3 cup of the meat mixture in the center of the cabbage roll. Bring in the sides and roll tight. Place the rolls on the tomato sauce in a single layer in the casserole dish.
Repeat until all the cabbage rolls are made and in the casserole dish. Top with remaining tomato sauce. Cover with aluminum foil. Bake in a preheated 350-degree oven for 80-90 minutes.