medium apples, peeled, cored, and thinly sliced (use firm apples)
teaspoon ground cinnamon
tablespoons fresh lemon juice
cup brown sugar, divided
cup all-purpose flour
cup uncooked old-fashioned oats
tablespoons reduced-calorie margarine
Preheat oven to 350 degrees. Stir together apples, cinnamon, lemon juice, and ¼ cup brown sugar; pour into a 1½ quart baking dish. Cut flour, oats, remaining ¼ cup brown sugar and the margarine together with a pastry blender or fork in a medium bowl; sprinkle over apple mixture. Bake until apples are tender and top is browned, about 45 minutes.