Simmer potatoes until fork tender. Remove skins, and cut into cubes.
In a bowl, combine celery, eggs, potatoes, onions, vinegar and seasonings. Toss lightly to combine.
In a separate small bowl, mix mustard, and salad dressing. Stir into potatoes.
Refrigerate before serving.
Variation: Add cooked and crumbled bacon bits to the salad dressing and proceed as above.
Submitted by: CM