After our recent apricot harvest, we got a bit sick of eating them. By we, I mean Rose (who didn't seem to like them much) and me, since Dad doesn't eat fruit. Plus some of them were a bit overripe and squishy for my taste. So I decided to dehydrate them in the oven.
First, halve the apricots and remove the stones, plus any squished or bruised bits. You can treat them with ascorbic acid supposedly to stop them going brown when they dry - I had ok results, but didn't really try to improve things. I found a great article online which covered all the detail.
Spread out to dry - I used a pizza tray as it had holes on the bottom to help with the drying. Leave the oven on the lowest setting possible (mine goes down to 50C) for as long as it takes. I left mine in for 24 hours, but they probably could have done with a bit longer. I used the fan forced option on my oven, as I think that ideally the temperature should be as uniform as possible. I didn't leave the door ajar, but did crack it open fairly frequently to let the steam escape.
You can see the results in the photo - they do taste good! As they don't have any preservatives, the article above recommends freezing or vacuum packing to prevent mould growth.