Spray a 2-quart square baking dish with nonstick cooking spray. Place apples in dish and sprinkle with lemon juice. In a medium bowl, stir together rolled oats, flour, brown sugar, cinnamon, and nutmeg. With a pastry blender, cut in margarine till mixture resembles coarse crumbs. Sprinkle mixture evenly over apples.
Bake in a 350 degree oven for 40 to 45 minutes or until apples are tender.
Values per serving: