In a Dutch oven, cook sausage, onion and green pepper until the sausage is browned and the vegetables are tender; drain. Add the remaining sauce ingredients; bring to a boil. cover and simmer.
Meanwhile, in a bowl, combine the first 8 meatball ingredients; crumble beef and sausage over mixture and mix well. Shape into 1 in. balls. Brown in oil; drain. Add to the sauce; cover and simmer for 2 hours. Serve on rolls. Top with cheese if desired. Yield: 10-12 servings.