My recommendations
Little India
10 KoppstraßeVery delicious!
Yppenplatz
YppenplatzHotspot especially in the summer.
Flatschers
113 KaiserstraßeBest Burger (from 11pm to 1am -> GinTonic Happy Hour , 2 for1)
Taqueria Los Mexikas
12 Lange G.Best Mexican place in town.