Sometimes gauzy pictures lie, but look at any snapshot anyone has ever taken of this iconic, overstuffed sandwich at the city’s last great Jewish deli, and you know it’s the real thing. It’s the way the warm meat heaps and buckles here and there, the way the tiny but all-important bits of fat peek through, the way the spicy mustard soaks into and stains the dense rye bread. Order a whole one and eat just half because that’s plenty. Then eat the other half. $18.95. 1141 S. Jefferson St., South Loop