If you are ever in the Chicago area, you should make a lunch or dinner stop at the Chicago Diner. Kevin discovered the diner when working there many years back and I finally made it there last year. Their cookbook is a nice addition to my vegetarian/vegan collection.
Now, on to the burgers. We baked our burgers a little longer than the suggested 20-25 minutes and it seemed to help them bind together nicer. Kevin thought the burgers had even more flavor the next day when he pan fried the pre baked patties. **Highlight the blue recipe title and it will take you to the Chicago Diner site.