This stuff is just offal.

"How many slices did you want?"

Over at NPR, they have a piece about the "variety meats" known as offal. (It's pronounced "awful", BTW.) 

Offal can take many forms: lamb kidneys, pig brains, cow faces, duck hearts, cow tongues, that sort of thing. The example above is terrine: "crunchy pig's ear encased in gelatin."

Like I said, it's pronounced "awful." Although I must add, if you're going to kill an animal, I guess it makes sense to eat every last bit of it. Even the testicles!)