Christmas Sour Cream Potato Salad

1/3 cup Italian Salad Dressing
7 med. potatoes, cooked in skins, peeled, and sliced (about 6 cups)
3/4 cup sliced celery
1/3 cup sliced green onion
4 hard boiled eggs
1 cup mayonnaise
1/2 cup sour cream
1-1/2 teaspoons prepared horseradish mustard
Salt to taste & Celery seed to taste

Pour Italian dressing over warm sliced potatoes. Chill 2 hours. Add celery and onion.
Separate egg whites from yolks, chop, and add. In small bowl, sieve yolks (I just mash them with a fork). Mix with mayo, sour cream, and mustard; fold into salad. Add salt and celery seed to taste. Chill 2 hours.
Use bits of green onion stalk and pimento to decorate the top in a festive manner.
Makes 8 servings.