Nothing too out of the ordinary, but two places stick out for when I'm at MSP: Wok n' Roll and the pizza place by the Northstar Crossing, where all the shops are. The former has awesome udon soup, while the latter has really good stromboli (especially the breakfast stromboli at, um, breakfast).

At MDW (and I think ORD) there's also Manny's. I brought a friend out there when I worked for NW so she could fly at the companion rate, and had an hour before I turned around. She instantly recommended the place as soon as we saw it outside the gate, and it really did hit the spot. Good comfort food there.