Grandma Margie's Potato Salad

For pretty much every occasion, my Grandma Margie made potato salad -- A LOT of potato salad.
Her recipe was mostly of the "little bit of this" "not too much of that" variety, but I've gotten it into measured amounts, but kept her advice in the directions...for a large crowd.

In terms of mayonnaisey potato salads, Grandma Margie's is the only one I will eat. True story.

yield: A LOT OF POTATO SALAD

ingredients
5lbs potatoes
1 medium onion (or a bunch of green onions), diced
6 pieces celery, chopped
5 hard boiled eggs, cooled & chopped
2 tsp dried parsley
1 tsp salt
1 tbs vinegar
64oz mayonnaise (I use Duke's, Grandma used Hellman's)

directions

1. Boil potatoes in skins until done (but not falling apart).
2. Slice potatoes (but not too thin).
3. Add celery, onions, eggs, and parsley in a big bowl. Mix together.
4. Add half of the mayo and mix thoroughly.
5. Sprinkle in vinegar and add the other half of the mayo until evenly coated.
6. Mix until salad tastes right and isn't too dry.
7. Enjoy!