A while back, I was guided to a lot of tasty chow by the thread on Tortas Ahogada here: http://chowhound.chow.com/topics/761907
Now I'm looking for it's cousin from Mexico City, the Pambaso.
It looks like the fillings are slightly different, and the Pambaso is dipped into sauce before grilling instead of afterwards, making it (I assume) a little easier to eat.
It was once served from a trailer on South 1st St that has long since vanished. Anyone seeing this sandwich around town?
Here's the video from Taco Journalism that inspired my craving: