Slow Cooker Golombki

1 lb ground beef
1 small onion
1 c uncooked converted rice
3/4 tsp salt
1/4 tsp pepper
1 jar meatless spaghetti sauce
2 can tomato soup, undiluted
1 c water
1/2 tsp sugar
1 medium head cabbage, chopped

Cook beef and onion over medium heat in a skillet until meat is no longer pink; drain. Stir in the rice, salt and pepper.Combine the spaghetti sauce, soup, water, and sugar in a large bowl. Layer 1/3 of the sauce, half of the beef mixture and 1/3 of the cabbage in a slow cooker. Repeat layers. Top w/ remaining sauce and cabbage. Cover and cook on low for 6-8 hrs or until tender.