Preheat your oven as low as it will go.

Use an apple corer to remove the apple cores.

Slice the apples into thin rounds, then dip them into the orange juice to prevent them from discolouring and to add some extra flavour.

Spread the apple slices over a wire cooling rack in a single layer and pop them into the oven for a few hours or overnight, or until completely dried out and crunchy.

(If your oven runs a bit hot, you can prop the door open a little with a wooden spoon.)

Once the apple slices are completely cool, transfer them to an airtight container.