1. Shred cabbage, onion, and green pepper in a large bowl. 2. Pour sugar over mixture; do not stir. 3. Combine vinegar, oil, celery seed, salt, pepper, and dry mustard. Bring to a rolling boil. 4. Pour over cabbage mixture while hot; do not stir. 5. Refrigerate for at least 12 hours. 6. Stir well before serving. |