If you have a favorite recipe for meatballs, use it instead of the frozen meatballs. Simply shape the meatball mixture into 72 appetizer-size balls. Cook the meatballs thoroughly, then combine them with the sauce ingredients in the slow cooker.
You can turn this easy appetizer into a satisfying meal. Serve the meatballs over egg noodles, rice or couscous and sprinkle with chopped parsley. Add steamed green beans and a salad of fresh sliced tomatoes drizzled with olive oil and sprinkled with shredded or shaved Parmesan cheese.