All-purpose flour, Salt, Baking powder, Granulated sugar, Shortening, Butter, Milk, Egg, beaten well, Tart apples, peeled and cut into eighths, Light brown sugar, Cinnamon, Coarsely chopped walnuts, Lemon sauce, Granulated sugar, Cornstarch, Salt, Boiling water, Grated lemon peel, Fresh lemon juice, Butter, In a saucepan , combine sugar, cornstarch and salt. add boiling water. cook, stirring constantly, until mixture is thick and clear. stir in lemon peel, lemon juice, and butter. serve warm.