Preparation
Step 1
In a large bowl, put the boiled potatoes, eggs, celery, onions, and apples.
Step 2
In a small bowl, mix together the mayonnaise, mustard, sugar, and salt; and then pour the mixture over the ingredients. Stir the mixture gently until they are incorporated together.
Step 3
Cover the bowl, and refrigerate it for at least 3 hours before serving it.