You can get a Maxwell Street–style Polish anywhere in this city, but there’s really only one worth traveling for. Express Grill, hard by the Dan Ryan Expressway just north of the street the sausage is named after, serves up a charred, smoky link on a squishy hot dog bun that’s been slathered with yellow mustard. Sweet grilled onions are packed on top, a giant spicy pepper joins the party, and the whole thing is handed to you in a bag with soft fries and more packets of ketchup than you could possibly need. $5.30; 1260 S. Union Ave., Little Italy