3 - 4 cups diced cooked potatoes
2 or 3 hard-cooked eggs, minced
¼ - ½ cup finely chopped onion
¼ - ½ cup chopped celery
1/4 cup sweet pickle relish
1 tsp. celery salt
1/8 tsp. black pepper
1/8 tsp. celery seed
1½ - 2 tbs prepared mustard
½ - ¾ cup mayonnaise, or as needed