Simmer chicken breasts in water with seasoning OR I also like to throw them in the crockpot (my quickest way to cook chicken) with some chicken broth and seasoning till tender
You can either chop the breasts into chunks or place them whole into a shallow, greased baking dish
Cover breasts with 1/2 cup sliced almonds and the can of water chestnuts
Mix together cream of chicken soup and mayonnaise (I add quite a bit more of the mayonnaise than is called for to the sauce but I like it thick and rich)
Pour over the covered breasts
Top with the grated cheese, remainder of almonds and bread crumbs to suit
Bake uncovered for 30 minutes at 350 degrees