Apple Filling – Preheat oven to 400 degrees. – Cut side cheeks off apples, discard cores  – Using a sharp knife, cut each apple cheek into thin, equally-sized apple slices. Keep slices together to maintain their shape. – Remove tart pan from the freezer. – Arrange sliced apples onto crust, one cheek at a time, until pan is filled. – Sprinkle apples with granulated sugar. – Top with butter cubes and cinnamon. – Bake 35 minutes or until the apple slices are tender and the crust is golden brown. – Cool on a baking rack before slicing.