These are great for camping and backpacking trips when you need nutrients without all the water-weight.
Feel free to add cinnamon to the apples for extra flavour.
Preheat the oven to 200ºF (95ºC).
Core your apples and slice them very thinly (leave on the skin for a bit of extra fibre).
Line a baking tray with parchment paper and lay out all of the apple slices with space between them so they’re not touching.
Put the tray in the oven and let them dry out low n’ slow for 6-8 hours. I recommend doing this overnight so you can check on it in the morning.