When I lived in Laredo TX decades ago, tongue/lengua was a very popular taco filling. A peculiarity of the local dialect, at least back then, was that they used the term mariachi to indicate what I’ve seen called tacos everywhere else. It confused a lot of people. IAC, I purely love mariachis de lengua.
I had a taco de ojo at Maxwell Street market a few years back on a rainy day in April. It was not exactly what I had expected. I thought the eyeball would be chopped up into an unrecognizable mass but, oh no. There it was, nestled in the middle of my taco, a gelatinous golf-ball, surrounded by some goat meat. It was one of the few times I’ve ever hesitated before biting into food. I did end up eating it all, and it wasn’t so bad. However, I doubt it’s going to be the new taste sensation. You can also find them down here on 47th Street (a place just west of Hermitage comes to mind), along with sesos (brain), lengua (tongue), etc. Actually, brain and tongue tacos are pretty easy to find. Ojo is a little tricky – I’ve only been able to find them on Maxwell Street and that joint on 47th.
Good Lord – none of that’s regional, is it? That’s just mainstream British grub. Say regional to me and I’m thinking of stottie cakes and pease pudding, Singin’ Hinnies and Pan Haggerty. Gateshead Bacon Floddies, in particular, deserve to be much more widely appreciated.
I never came across any of them in England.
In similar joints, I have cured hangovers with huervos con cueritos (eggs scrambled up with peppers, etc. and pickled pork skins).