In Iran, fruit leathers are called lavashak. After cooking the fruit puree, they add some salt. Then spread it in thin layers in the tray. They usually put the tray on the roofs to dry.
Lavashak is from Iran, In this region, most of the popular lavashaks have a sour taste. They serve lavashak with Torshak, pomegranate paste, prune, and Gheisi(dried apricots) to multiply its sour taste.