Candied orange and lemon

For the orange slices:
n. 10 SLICES OF FRESH ORANGES
ICING SUGAR

For the lemon slices:
n. 10 SLICES OF LEMON
ICING SUGAR

Method:
Wash the oranges and lemons, dry and cut into thin slices 1 mm thick with a sharp knife. Sprinkle on both sides with a thin layer of icing sugar. Arrange the orange slices on a baking tray. Let them dry in the oven at 100 degrees for about 40 minutes, leaving them until they are dry and caramelized.