Slice 2 layers of raw zucchini in the bottom of a 9x13 inch cake pan. Fry together 1 pound of hamburger and 1 onion (season as desired). Put on top of raw zucchini. Mix together and pour over hamburger and zucchini, 2 cans cream of mushroom soup. Bake at 375 degrees for 35 minutes. Sprinkle cheese on top. Put back in over until cheese melts.