Hawaiian sweet and sour meatball sauce is made by cooking together 1/2 cup brown sugar, 1 cup pineapple juice, 1 tablespoon soy sauce, 1 tablespoon cornstarch and 1/3 cup apple cider vinegar, plus a diced green pepper. Boil the ingredients in a saucepan before serving the sauce.
After boiling the ingredients, add the sauce to a slow cooker along with 1 pound of cooked meatballs. Place the slow cooker on low for several hours to allow the sauce to soak into the meat. The sauce can be made ahead of time and stored in the refrigerator.
Sweet and sour sauce for meatballs can be customized by adding garlic, black pepper, lime juice, ginger or jalapeño peppers to the recipe. For a more savory sweet and sour sauce, consider adding 1 tablespoon of fish sauce to the recipe.
Another sweet and sour sauce recipe combines 1 cup chopped green bell pepper, 1 20-ounce can pineapple with juice and 1 cup chopped white onion with the wet ingredients of 2/3 cup brown sugar, 1 cup ketchup, 1 cup water, 4 tablespoons white vinegar and 4 tablespoons Worcestershire sauce. Pour the sauce over 2 pounds of uncooked meatballs in a glass baking dish and bake the dish at 350 degrees Fahrenheit for one hour.