Looks quite interesting!
After doing a little research on the Internet, I got the impression that the Philly Cheesesteak is more widely known outside Philadelphia than the Italian Beef is known outside Chicago. Go figure - because it looks delicious.
As a matter of fact, until about two years ago, there was a pizzeria (!) near me here in Brooklyn that served Philly Cheesesteaks. You'd think
they would be the ones to serve Italian Beef! But,
noooooo..... (After many years, the place closed up and is now a Russian liquor store.
)
Anyway, for the uninitiated (and I count myself among them), here are a couple of links that are quite informative:
Italian Beef - Wikipedia Article & Recipe at www.amazingribs.com Recipe at www.great-chicago-italian-recipes.com Actually, there are plenty of recipes available online; I chose the ones that seemed the most representative. You may, of course, disagree - particularly if you are a true devotee (and have spent time in Chicago).
Signor V.