PREHEAT oven to 350°F. Toss apples, lemon juice and cinnamon in 2-quart baking dish.
CUT margarine into combined flour and brown sugar in medium bowl until mixture resembles coarse crumbs. Stir in graham snacks. Spoon over apple mixture. Cover loosely with foil to prevent topping from over-browning.
BAKE 40 minutes or until apples are tender. Cool slightly.