It explains lutefisk.

Quote from Garrison Keillor's book Lake Wobegon Days: Every Advent we entered the purgatory of lutefisk, a repulsive gelatinous fishlike dish that tasted of soap and gave off an odor that would gag a goat. We did this in honor of Norwegian ancestors, much as if survivors of a famine might celebrate their deliverance by feasting on elm bark. I always felt the cold creeps as Advent approached, knowing that this dread delicacy would be put before me and I'd be told, "Just have a little." Eating a little was like vomiting a little, just as bad as a lot.

Quote from Garrison Keillor's book Pontoon: Lutefisk is cod that has been dried in a lye solution. It looks like the desiccated cadavers of squirrels run over by trucks, but after it is soaked and reconstituted and the lye is washed out and it's cooked, it looks more fish-related, though with lutefisk, the window of success is small. It can be tasty, but the statistics aren't on your side. It is the hereditary delicacy of Swedes and Norwegians who serve it around the holidays, in memory of their ancestors, who ate it because they were poor. Most lutefisk is not edible by normal people. It is reminiscent of the afterbirth of a dog or the world's largest chunk of phlegm.

Interview with Jeffrey Steingarten, author of The Man Who Ate Everything (translated quote from a 1999 article in Norwegian newspaper Dagbladet): Lutefisk is not food, it is a weapon of mass destruction. It is currently the only exception for the man who ate everything. Otherwise, I am fairly liberal, I gladly eat worms and insects, but I draw the line on lutefisk.

• the above is from Wikipedia entry on lutefisk. Believe it or not.