Howdy,
Well, I gotta say - my ORD ideas differ a bit from CharlesMD's.
If I'm in G and staying in G - then breakfast is some pastry cinnamon sticks from that place a stiff cup of french roast from Starbucks (just off G, but close enough).
If I'm heading over to H/K or god forbig L...then breakfast changes only slightly - I'm sticking with Starbucks for coffee (black - french roast); however I do truly love donuts so breakfast becomes a couple of french crullers from Dunkin.
Lunch or Dinner are the same - (and no contest) - Wolfgangs Resturant at the front of H/K just off security. Wife loves the soup, I love the meatloaf and we all like the pizza's for a change of pace.
As far as I can tell - that's about it for food at O'Hare.
Boston Logan - there's also only one choice - Legal Seafood.
I'll try to edit this as I remember others...
Keep the faith,
Pakse