Leave to cool on a wire rack, then keep in a sealed jar.
Remarks
It is important to use very ripe apricots, or the drying will bring out any tartness.
You can also sprinkle the apricots with caster sugar before they go in the oven, but they will no longer have that natural dried apricot flavour.
Those fortunate enough to have a proper bread oven can make use of the residual heat after baking bread. Put the apricots in at 194°F (90°C) and leave for 8 to 10 hours.