Prepare you lemon water bath by adding water to a large bowl. Add ice cubes and lemon juice.
Core and peel one apple at a time (this prevents browning.
Slice apple to the desired shape and thickness. I like to slice my apples into rings approximately 3mm thick.
Place sliced apple into the lemon water bath and submerge to ensure all surfaces of the apple comes into contact with the lemon water.
Continue slicing the remaining apples and placing them into the lemon water bath.
Lay apple slices onto drying racks or baking trays, ensure that there is no overlapping.
Place racks into dehydrator or oven set to 60-65 degrees Celsius.
Dehydrate apples for between 4-8 hours, depending on the thickness of the slices and the temperature of the dehydrator/oven.
Once apples are dehydrated to the desired texture (they should be chewy and not contain any juice), allow to cool completely.
Place into an air tight container or jar and seal. Ideally you will use a clear container so that you ensure there is no condensation (read above if you see condensation forming in your container or jar).
Store in a cool, dark, dry place for up to 12 months.
Notes
You can scale this recipe up or down depending on how many apples you have.