I am a fan of Oxtail stew, I had one the other day. I still also cook liver (lambs) and onions with bacon. Kidneys are also a favourite as is Faggots and Haggis.
Ooh yes - liver and mash with onion gravy. The thought is making my mouth water.
Also oxtail - not the tinned soup but proper oxtail slow cooked until it falls off the bones.
Dare I add - lamb's hearts stuffed and braised.