During blistering winters in Tusheti, temperatures regularly fall below -15°C, and villages on the slopes of the Caucasus Mountains are cut off by metres of snowfall. For centuries before becoming restaurant favourites, khinkali were a warming offering for Caucasus shepherds, with chopped lamb or mutton at the centre, which was replaced by ground beef and pork as the dumpling migrated to the city.Matthew Ponsford (BBC)