Measure about 1/4 cup concentrate into small bowl; stir in cornstarch and spices. Place the remainder of the concentrate into a large skillet with the apples. Simmer gently until apples are just tender. Lightly stir in cornstarch mixture until quite thick. Stir in butter. Pour into pie shell; top with whipped cream and nuts. Flavored Whipped Cream: Into whipping cream, fold 2 frozen lemonade concentrate, thawed, crushed peanut brittle and ground orange peel. (Tart shells may be substituted for the baked pie shell).