Unlike a sand witch, a sandwich doesn't have the power to turn men into sand and sand into poisoned glass. Let a sandwich cast a devastating spell on hunger pains with today's Groupon: for $5, you get $10 worth of deli fare and drinks at the Bergstein's NY Delicatessen food truck. Truck destinations are subject to change, so you should check their Twitter for the most up-to-date schedule; the truck's general schedule is Mondays outside the Aon Center, Tuesdays at Wacker and Monroe, Wednesdays outside 600 W. Chicago, Thursdays at Fairbanks and Superior, Fridays at Merchandise Mart, and Saturdays at Armitage and Halsted.

The Bergstein's NY Delicatessen food cart carts around authentic New York–style deli fare made fresh by in-house cooks. Check the truck's Twitter to pinpoint locations around downtown or simply listen for the melodious unwrapping of corned beef on rye sandwiches ($8.50). Once parked, the meal mobile entertains waiting customers with a flat-screen television and outdoor speakers while chefs serve a menu of salads and sandwiches. Taste buds can traverse the crispy mixed greens of the Big Apple salad ($8) or the swiss-cheese-glued corned beef and pastrami of the Bensonhurst ($9.00). Aggressive pickle publicists get their clients featured with every sandwich, and diners can choose from several sides including homemade chips, macaroni salad, or potato knish ($1 each; $2 for knish or a drink-and-side combo). Desserts such as the big black-and-white cookie ($2.25) add a sweet exclamation point to a thorough dissertation on deliciousness.