Press raw hamburger into ungreased 9x13 baking dish.
Make Stuffing. First, in a small saucepan, melt margarine and saute onion and celery. Meanwhile, rip bread slices into small pieces in a large bowl. Add your sauted onion and celery, beaten egg with just a little water, and seasonings as desired to your taste. Mix together well and put on top of hamburger in your dish.
Spread can of cream of chicken soup on top of stuffing.
Crush corn flakes in your hands and crumble on top. Use as many as you like.
Bake at 350 for 45 minutes or until hamburg is brown. Enjoy!