I will be in town for a week and want to have the best food in Chicago. Anything unique to Chicago is preferable. It doesn't matter if it is a $1 taco stand or $100 a head, it just has to be damn good. I also have to take someone out for their birthday (who happens to be a chef in NYC). Any suggestions for new and amazing restaurants? He's worked for Charlie Trotter, so something other than that please. Also in NYC they sometimes have ethnic street festivals that consistantly have great food. Is there anything like this in Chicago? Thanks in advance!