In a Dutch oven, cook the beef, sausage, onions and garlic over medium heat until meat is no longer pink; drain.
Transfer to a 5-qt. slow cooker. Stir in the tomatoes, tomato paste, water, sugar, Worcestershire sauce, oil and seasonings.
Cook, covered, on low 8-10 hours. Discard bay leaves. Serve with spaghetti.
