1.
Boil a dozen eggs (cook them how you would normally cook hard boiled eggs).
2.
When eggs have cooled, peel eggs.
3.
In a bowl chop or mash hardboiled eggs.
4.
Add mayonnaise, mustard, celery salt, black pepper, and garlic to the chopped eggs. Mix thoroughly. Cover and refrigerate egg salad until burgers are cooked.
5.
In a bowl mix ground beef, McCormick's Hamburger seasoning, chopped celery, and diced onions.
6.
Shape ground beef mixture into 6 hamburger patties.
7.
Cook patties on grill for desired amount of time ( i.e. rare-well done depending on how you like it).
8.
Melt a slice of American cheese on burger (this is optional).
9.
Place cooked hamburgers on buns.
10.
Top burgers with the egg salad mixture, slice of tomato, and lettuce and Enjoy!