Wash, peel and core apples. If you like the star, leave the core in, but pick out the seeds.
Slice apples thinly and evenly (1/4 inch), use a mandolin if possible. Just don't cut yourself!
Sprinkle slices with a light dusting of cinnamon.
Arrange apple slices on dehydrator sheets.
Dehydrate at 135°F (57°C) for 6 to 8 hours.
Check apples for any moisture on outside and inside. The slices should feel dry and leathery without any tackiness. Rip a slice in half to see if there is any moisture on the inside - it should look like dry dense sponge.
Allow to cool several hours before storing in an airtight bag or container.
Store in a dry, cool, dark place for several months (if you don't eat them all!)