2 lb. yellow squash
3 med. tomatoes, peeled & sliced
2 onions, sliced thin
butter
Salt & pepper
Parmesan cheese

Grease a 2 quart casserole. Slice squash. Layer in casserole. Add layer of tomatoes, then onion. Sprinkle with salt and pepper to taste. Sprinkle with cheese. Repeat until all vegetables are used. Dot with butter. Cover. Bake at 350 degrees for 45-50 minutes.