Arrange apple slices in a shallow baking dish; sprinkle with the water and the lemon juice. Combine sugar, flour, ground cinnamon, and 1/8 teaspoon salt; sprinkle over apples. Bake covered, in a 350 F. oven about 45 minutes or till apples are tender. Uncover; top with the shredded American cheese. Bake 5 minutes more or till cheese melts.