Does anyone know what elder is? I remember something like this at the offal stall on the market as a kid and it used to make me want to throw up. It looked like some disgusting beige paste of ground bodyparts.
I was offered a little bit around fifteen years ago - I think it may have partly jellied, a little like ox tongue. The chap who was happily munching on his piece of cow's udder had bought it at Barnsley Market, but I've no idea whether it's available these days.