Delicious potato salad according to a proven recipe.

Delicious potato salad according to a proven recipe.
Ingredients:
50 grams of celery
50 grams of parsley root
100 grams of carrots
600 grams of boiled potatoes
2 pickled sterilized cucumbers
1 small onion
2 boiled eggs
salt
grinded pepper
100 milliliters of mayonnaise
1 tablespoon full-fat mustard
2 spoons of sour pickle from cucumbers
2 spoons of sterilized peas