Lutefisk (norwegian, pronounced [ˈlʉ̂ːtfɛsk] in northern and parts of central norway, [ˈlʉ̂ːtəˌfɪsk] in southern norway; swedish: lutfisk [ˈlʉ̂ːtfɪsk]; finnish: lipeäkala [ˈlipeæˌkɑlɑ]; literally "lye fish") is dried whitefish (normally cod, but ling and burbot are also used). it is made from aged stockfish (air-dried whitefish), or dried and salted cod, pickled in lye. it is gelatinous in texture after being rehydrated for days prior to eating.lutefisk is prepared as a seafood dish of several nordic countries. it is traditionally part of the christmas feast; norwegian julebord and swedish julbord, as well as the similar finnish joulupöytä.

Source: Wikipedia