2 bunches celery (about 3 lb.)
2 cups buttermilk
6 green onions, cut 1-inch
salt and pepper, to taste
1/4 tsp. celery seed
1 cup ice water

Remove leaves from celery stalks; reserve leaves for garnish.

Place half of celery and 1 cup buttermilk in blender. Add half of the green onions, salt and pepper and celery seed to blender. Scrape celery mixture into a large metal bowl. Repeat with remaining celery, buttermilk and green onions. Stir in ice water. Refrigerate. Garnish with reserved leaves.