This is a very old recipe of my mother's.

3 cups mayonnaise
1 (2-oz.) can anchovy fillets, drained & rinsed
4 green onions, chopped
1/4 cup lemon juice
1 tablespoon parsley, chopped
1/4 cup vinegar

Combine all ingredients in blender. Cover and blend until smooth. Chill well.

Yields 4 cups.