Had bofe in a Colombian pueblo, it had tubes poking out of it and tasted vile. I called the "chef" over to ask him what it was and he didn't personally know which part of which animal it was.

Got home and googled it and it turned out to be pigs' lungs. If you fancy trying it then find yourself a pig that smokes a pack of Marlboro a day so it has a bit more flavour.

Anyone ever eaten a century egg?