I was in Chicago in August and we ate at West Egg Cafe every day. They have a variety of breakfast and lunch foods, and everything is great. They use a lot of spinach, feta, tomato, avocado, and other tasty, healthy stuff that is much better than your average breakfast restaurant. Vegetarians have a good selection also, and one of my favorites is their side dish of fresh strawberries with whipped cream. Try to go during the week because it is busy, but it's worth the wait on the weekend!
Pros: Great taste, healthy ingredients
Cons: Service can be great, awful, and anywhere inbetween