In a medium bowl, mash the eggs with the back of a fork. You can make the pieces as chunky or as smooth as you prefer.
Stir in the mayonnaise, stone ground mustard, and celery salt. Combine everything until well blended. Don’t be afraid to adjust the quantities to suit your family’s taste preferences.
Taste the egg salad and add salt and pepper if desired. Use it as a brunch side dish, to fill croissants and make the best egg salad sandwich, as a spread or serve it at your next picnic.