Oh, you mean simit.
I just had lunch in Üsküdar at a wonderful place that serves Lokantasi hazir yemek. The place is called Kanaat Lokantasi. You must try it next time you're in town.
I've never been to Üsküda, but I've been next door in Kadıköy, and even that was mostly to say I'd been to Chalcedon. I never spent much time outside the Theodosian wall, except for Galata. What all did you have? I have to give the Turks their culinary due: they have the best variation of Mediterrean for most dishes.