Approaching Christmas, Frankfurt has one of the best markets around, only to be bettered, in this wirter's opinion, by Marburg's or Munich's.
But also at this time you can find really excellent street stalls selling Frikatelln, CurryWurst and other such delights best enjoyed on the way to the Waldstadion on match days.
Frankfurt is truly ranked alongside London and Cologne as a centre for culinary choice and enticement!