go with vegetables while you are staying there. near 1. Möttelistr. 9 2.Trautenmühleweg 17 3.Rheinstraße 5 4.Teuringer Str. 51/1 there are masjid. about halal restaurents, there is really crisis of it. though most of turks restaurent use the word halal, still its not halal. so go with salat, vegetables and sup =)