Step 1

Cut potatoes into halves or quarters, depending on their size. Place in a large pot and cover with water. Bring to a boil, then cook on medium for 12 15 minutes test to see that they are cooked but not falling apart. Drain well and cool while preparing remaining ingredients.

Step 2

Make the dressing by combining mayonnaise, sour cream, celery salt and salt and pepper.

Step 3

In a large bowl, toss potatoes with about half of the dressing. Smooth the potatoes into an even layer and add remaining ingredients in layers: celery, eggs, green onion. Top with about half the bacon and half the parsley, then spread remaining dressing on top and sprinkle with reserved bacon and parsley to garnish.

Step 4

Cover with plastic wrap and chill for 1 hour or up to 1 day before serving.