The food — politely called "white kidneys" in Serbian — is believed to be rich in testosterone. In the Balkans, it is considered to help men's libido.
"The bulls' testicles are the best, goulash style," said last year's winner Zoltan Levai, stirring a metal pot heated by a wood fire and filled with vegetables and large testicles that he said were provided from a state-run slaughter house.
The festival — which includes dishes like testicle pizza and testicles in bechamel sauce flavored with a variety of herbs found in the region.
http://www.google.com/hostednews/ap/article/ALeqM5gP3SCc0zMq1BD6No9L44_H13zNUwD9HTAKPO0 via Jammie Wearing Fool | Photo (unrelated) of Texas calf fries by Flickr user austrini used under Creative Commons license
Previously: Cooking with Balls