Place everything but the eggs into a bowl.

Whisk them together and taste. Adjust mustard, salt, lemon juice and sugar to your preference.

Add diced eggs until you reach the egg-to-mayo ratio you prefer.

Butter two slices of bread. I like to use Milk Bread or Brioche.

Add egg salad to one side. Top with alfalfa sprouts or lettuce. Add the other slice of bread.

Slice and serve.