Hakarl
Hakarl is served during the Icelandic Midwinter Festival in Thorrablot, Iceland. The dish is actually a rotten shark meat that’s been buried and left to decompose in the ground for a few months. After that, the meat is left on a drying rack for two months or more, leaving a white, edible flesh. The only way the shark can be eaten is if it goes through this process, otherwise its high amounts of uric acid that make the meat toxic.