2 cups ground cooked chicken
1/3 cup chopped celery
1 small onion, chopped
1/2 cup grated Cheddar cheese
1/2 cup mayonnaise-doesn't matter if it is cold or if you have some in the cupboard that hasn't been opened yet
Buttered hamburger buns
Mix ingredients together and spread on buttered hamburger buns. Wrap in foil and heat in a 250 degree oven for about 20 to 25 minutes
I edited to answer your questions..cooked chicken, doesn't matter if the mayo is cold or not. If you have some that is in the cupboard, that you haven't opened up yet..that will work to. The cheese adds to it too.