Chop the peeled eggs into small pieces.
Place the chopped eggs in a bowl.
Dice celery and add to eggs.
Dice onion and add 2 tbsp of diced onion to eggs.
Add the mayonnaise, mustard, and salt to eggs and mix well.
Eat salad by itself or add to bread to make a sandwich.
Store any leftovers in an airtight container in the fridge.