Pam's Sour Cream Potato Salad

1/3 cup Italian salad dressing
7 medium potatoes
3/4 cup celery
1/3 cup green onions
4 hard cooked eggs
1 cup mayonnaise
3/4 cup sour cream
1 1/2 t. horseradish mustard
Salt to tasts
Celery seed

Cook potatoes, pour Italian salad dressing over warm cut up potatoes.Chill
two hours. Add celery, onion and chopped egg whites. Sieve egg yolks,
mix with mayonnaise, sour cream, and mustard. Add to potatoes. Add salt and celery salt.