Italian beef is a popular sandwich style in Chicago that features seasoned roast beef with meat juices on an Italian-style roll (it looks something like this). Giardiniera, a spicy blend of pickled vegetables, is typically offered as a topping for the sandwich.
Subway's version includes braised beef in a herb-garlic au jus, provolone cheese, and Giardiniera. Their Giardiniera is made with jalapenos, carrots, cauliflower, and celery.
The price tag is $5 for 6-inch and $7.75 for Footlong.