Pineapple Crumb Cake
["1 large can crushed pineapple or substitute cherry or apple pie filling", "1 c. sugar", "1 c. water", "2 sticks margarine", "3/4 c. chopped pecans (optional)", "1 box yellow cake mix"]
["Mix pineapple, water and sugar in a large baking dish. Sprinkle cake mix on top.", "(Do not mix.)", "Slice butter on top of cake mix.", "Sprinkle nuts on top, if desired.", "Bake at 350\u00b0 for 1 hour."]
["pineapple", "sugar", "water", "margarine", "pecans", "yellow cake mix"]