1 head cauliflower
1 lg. bunch broccoli
1 bunch green onions
2/3 c. mayonnaise
1/3 c. buttermilk
Salt
Pepper
Celery seed

Break cauliflower and broccoli into bite-size pieces. Chop scallions. Mix remaining ingredients. Pour over vegetables. Mix well. Cover and refrigerate overnight. Easy to prepare, must be made in advance. Yogurt may be substituted for mayonnaise.