Preheat oven to 350

Saute 5 medium sliced yellow squash and 1 medium sliced onion in 2 Tablespoons butter. Add 2/3 cup water; cook until tender. Drain. Add 1 beaten egg, 10 crumbles saltine crackers and 1 cup grated cheese. Mix and put into a buttered 1 quart baking dish. Bake at 350 until brown, approximately 20 minutes.