Check and Double Check Those Translations

I took this photo near our hotel in Porto. I'm not entirely certain what dish on the first line this was a mistranslation of, but it doesn't sound very appealing:

Comments

[JB]

Methinks it was "cock" and a translator who knew just enough to know that word had non-fowl connotations and tried to identify an alternative with a thesaurus.

Or perhaps it's just potatoes served by a waiter with a bad attitude.

[Randinho]

Actually, they have a cut of meat called prego, which means spike and they serve it always on or with something: prego no prato (on a plate), prego no pao (in bread) and prego com batatas (with potatoes).