You could try the new kosher cafe by Wolfgang Puck at the Spertus Museum, 1 block north (except not on Saturday).
Yolk, two blocks south, has a lunch menu in addition to breakfast, I believe.
You have a couple of good suggestions on Printers Row already -- there's also Mediterra (kebabs, wraps), Standing Room Only (closed Sun) for chicken sandwiches etc, and Trattoria Caterina for weekday lunches.
Panozzo's, 4 blocks south on Michigan, has very good sandwiches for take out.
For dessert stop by Canady le Chocolatier for a chocolate or gelato afterwards (Wabash just south of 8th St).