In a large bowl, combine the eggs and milk. Add the bread crumbs, cheese, salt, pepper and garlic powder. Add beef and sausage, and mix well.
Preheat the broiler. Shape the meatball mixture into 1-inch balls. Place them in a 15x10x1-inch baking pan. Broil 4 inches from the heat for four minutes, then turn and broil for three minutes longer. Transfer the meatballs to a 5-quart slow cooker.
Combine the tomato sauce, tomato paste, onion, green pepper, wine, water, garlic, oregano, sugar, salt and pepper.
Pour the sauce over the meatballs. Cover the slow cooker, and cook on low for four to five hours.
Serve the meatballs on rolls. Sprinkle with shredded cheese if desired.
