Place thinly sliced oranges, grapefruits or lemons in a single layer on a baking sheet.  Sprinkle generously with sugar.  Dry them in a 200 degree oven, flipping once, until crisp, about 6 hours.

 

Citrus Crisps

 

 

 

 

 

 

 

 

 

 

Recipe courtesy of Martha Stewart Living.