Coleslaw with Yogurt Dressing

5 lbs. cabbage, finely shredded, some purple cabbage is ok
1 lb. 8 oz. carrots, grated
12 oz. onions, finely chopped
12 oz. celery with leaves, chopped

Make-ahead Yogurt Dressing

2/3 cup plain low-fat yogurt
2/3 cup Canola Oil
1 3/4 cups vinegar
1/4 cup honey
4 tsp. paprika
4 tsp. caraway seed
2 3/4 tsp. dill weed
3/4 tsp. celery seed
3/4 tsp. salt
1/4 tsp. pepper
1/2 cup parsley, chopped

Combine dressing ingredients and whisk until well blended.  
This can be done one day ahead to blend flavors. Chill. Just before serving, pour
 dressing over vegetables which have been well mixed, tossing well to combine.
Serves 50 approximately 2/3 c. per serving.