Heat butter in saucepan. Add onion and garlic and cook until onion is soft. Add sugar, salt, pepper and mustard and stir over low heat for 2 minutes.
Add the remaining ingredients including Ocean SprayŽ Whole Berry Cranberry Sauce. Gently simmer for 5-10 minutes or until sauce thickens, stirring regularly.
Season ribs with sauce, BBQ and serve with sauce.