Cook spaghetti according to package directions. Meanwhile, in alarge skillet, saute the onion, celery and garlic powder in oil untiltender. Add the spaghetti sauce, beans, tomatoes, sugar, salt,oregano and bay leaf.Bring to a boil; cover and simmer for 10 minutes. Discard bay leaf.Drain spaghetti; top with sauce and Parmesan cheese.