In a large saucepan over medium heat, combine the first 6 ingredients; stir until sugar is dissolved. Add meatballs; cook until heated through, 20-25 minutes, stirring occasionally. , Editor's Note: To prepare in a slow cooker, heat sauce ingredients as directed. Add sauce and meatballs to a 4-qt. slow cooker. Cook, covered, on low until heated through, 2-3 hours.