How about some liverwurst (ливерная колбаса)?
I think it has a disgusting taste. I've only once eaten it but I believe I would never tried again.
Or these ones:
I have no idea what is the name of it in English.
Maybe something kind of "the pluck pies" or "pies with pluck". In Russian it's "пирожки с ливером". When "пирожки с ливером" are hot they're quite eatable but the colder the worse.