1.  Preheat the oven to 250 degrees.  In a small bowl, combine the sugar and cinnamon.  Using a serrated knife or mandoline, thinly slice
     the apples crosswise, discarding the seeds and both ends.  Arrange in a single layer on parchment paper-lined baking sheets; sprinkle
     with the cinnamon sugar.

2.  Bake the apple slices, turning every half hour, til dry, 1 1/2 to 2 hours.  Remove and transfer to racks to cool.  Store in an airtight container.