Place the apples in an ungreased 11x7x2-inch baking dish. In bowl, whisk brown sugar, 1 tablespoon flour, water and milk. Pour over apples. In another bowl, combine oats, pudding mix, sugar, cinnamon, salt and the remaining flour. Cut in butter until mixture resembles coarse crumbs. Sprinkle over apples. Bake at 350 degrees for 45-50 minutes or until topping is golden brown and fruit is tender. Serve with ice cream if desired.