Preheat oven to 400 degrees F. Grease an 8-inch square baking pan. In medium bowl combine flour, baking powder and salt. In mixer bowl cream shortening and sugar until light and fluffy. Beat in egg and lemon juice until smooth. Gradually beat in flour mixture and milk.
Filling: In small bowl combine sugar, cornstarch and cinnamon. In medium bowl toss apples with brandy and lemon juice. Add sugar mixture and toss. Spoon into prepared pan. Spoon dough dough evenly over filling. Dot with butter. Bake 30 to 35 minutes or until golden brown. Serve warm with vanilla ice cream or custard sauce if desired. Makes 6 servings, 375 calories each without toppings.