Pule cheese

Pule cheese or magareći sir, is a Serbian cheese made from 60% Balkan donkey milk and 40% goat's milk. The cheese is produced in Zasavica Nature Reserve.
Pule is reportedly the "world's most expensive cheese", fetching US$1300 per kilogram. It is so expensive because of its difficulty to produce, and its rarity: there are only about 100 jennies in the landrace of Balkan donkeys that are milked for Pule-making and it takes of milk to create of cheese.
The taste of Pule cheese is reputed to be similar to that of manchego, a combination of nutty and earthy flavours, accompanied by a crumbly texture.
In 2012, tabloids including The [Daily Telegraph] and the Daily Mail reported that Novak Djokovic had purchased the entire world's supply of pule cheese for his restaurants, but a manager at Zasavica denied these claims, stating that Djokovic's restaurant had simply been given a sample of pule cheese.