We know that there's more to sandwiches than ham on rye, more than even the fanciest, shmanciest burger. (In case we forgot, the Wall Street Journal this morning had a terrific reminder of great sandwiches around the country.) The street food of Sicily, or Vietnam, even a New Orleans po'boy: that's where the flavor is.
The sandwich in the picture? From a vendor in the Vucceria market of Palermo, Sicily. It's spleen. Like all organ meats, full of goodness.
Kinda like the old (Perry Como?) song,
"il mio panino, il panino," my sandwich is your sandwich, let's spend our lunchtimes together...
You should have had folks guess the contents of that sandwich - bet nobody would have said, "spleen." I thought it was bbq brisket myself.