Fred Harvey Cole Slaw
["1 head cabbage, shredded", "1 small onion, shredded", "1/2 sweet pepper (optional)", "1 tsp. sugar", "1/2 tsp. salt", "1/2 tsp. dry mustard", "1/2 tsp. celery seed", "1/2 c. oil", "1/2 c. vinegar"]
["Pour over cabbage; do not stir.", "Let set at least 4 hours. Toss and serve.", "Keeps well."]
["cabbage", "onion", "sweet pepper", "sugar", "salt", "dry mustard", "celery", "oil", "vinegar"]