Xel stares at the recipe, face twitching slightly. Sties he has known come to mind. Pigs may be cleanly animals naturally, but they are, in domesticated settings, and this is important, not kept in a cleanly manner. Mud. Things that look like mud but, and this is also important, aren't. Plus, all that horny toenail-like stuff. No, no, he is experimental, but there are limits, and feet are up there with kippers and creamed corn on muffins.
Still, never let it be said that he isn't game to cater to his guests.
When the gelatin has quite hardened, he chops the apple-and-current solution-marinated liver and sculpts them both into the form, at least, of the unspeakability, and serves it on dainty crustless triangles of toast, garnished as specified.