I made 20 deviled eggs for the draft this past weekend. I do nothing fancy with mine, but if you are looking to make excellent deviled eggs.
Boil 10 eggs for 10 minute and then remove from heat and chill in refrigerator.
Peel eggs, cut in half, and remove yolk.
Smash the yolks, add a tablespoon of mustard and stir. Add enough Mayo to make the yolks/mustard creamy.
Take a plastic bag fill with yolk/mayo/mustard mixture. Cut hole in corner of plastic bag and fill the half eggs.
Alternate: Add paprika, chives, bacon bits, etc on top on deviled eggs.