Boston's uncle showed us a great restaurant, Blind Faith Café in Evanston, north of the city. It's an all vegetarian restaurant committed to the environment. See website: http://www.blindfaithcafe.com/ for more info.
I'm comfortably committed to The Chicago Diner as my vegetarian restaurant of choice in the city, but Blind Faith Café is definitely as good, if not better and is an excellent choice when you are outside the city and don't want to mess with traffic or transport.
Between the 6.5 of us (it was the 2 year old's birthday!), we got a wide variety of dishes and all were excellent. I'm a terrible blogger and didn't write down each dish nor can I find everything on the listed menu (that's likely a good sign of a seasonally changing menu). I can tell you that I got a BBQ seitan sandwich. There were also fajitas and a meatloaf of some sort.