Potbelly has more than 400 locations scattered across the country, so it's kind of hard to grasp that the shop began with a single Lincoln Park location in 1977. To celebrate 40 years toasting sandwiches and helping to popularize giardiniera (the chain likes to call them hot peppers, but still), Potbelly is offering 40 percent off its subs this Thursday, June 1.



As is the case with these kinds of promotions, there is fine print. To get the deal, you'll need to visit a Potbelly in person between 11 a.m. and 3 p.m. and remind the cashier about the restaurant's 40th birthday. Also, you have to select one of the sandwiches from the regular menu, which includes standards like A Wreck and also limited-time offers like the turkey fresco.



You can pair one of the discounted subs with the shop's recently released Zapp's hot pepper (read: giardiniera) potato chips, which do a fairly good job of replicating the heat and acid of the condiment. They aren't quite as satisfying as the Zapp's Voodoo chips, but few things in life are.