Preheat oven to 350 degrees F. In 13x9-inch baking pan, melt butter in oven. Sprinkle graham cracker crumbs evenly over margarine; top with apples. In sauce pan, over medium heat, melt butterscotch chips with sweetened condensed milk. Pour butterscotch mixture evenly over apples. Top with coconut and nuts; press down firmly. Bake 25 to 30 minutes or til lightly browned. Cool/chill completely
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