Midwest - Looking for best fast food in Minn?

on our way to Minn for a twins,gophers,vikings sports weekend with the guys. never been there before is there a great fast food or local landmark that we have to eat at. (Last year in our Atlanta trip it was the Varsity)

thanks for your help

It might be too late, but I always go to Matt's for a Juicy Lucy whenever I am in town.