I had some crispy tripas (cow intestine) the other day. It was very tasty. I have a had lots of Foie Gras which is also awesome. Tripe and sweetbreads are on my list of offal I would like to try.Offal /ˈɒfəl/,[SUP][1][/SUP] also called, especially in the United States, variety meats or organ meats, refers to the internal organs and entrails of a butcheredanimal. The word does not refer to a particular list of edible organs, which varies by culture and region, but includes most internal organs other thanmuscle and bone. As an English mass noun, the term "offal" has no plural form. Some cultures shy away from offal as food, while others use it as everyday food, or in delicacies.
http://en.wikipedia.org/wiki/Offal
What are your favorites?