Editor's note: In a recent New York Times article, Joshua Hammer wrote about a tour that Nobel Laureate Orhan Pamuk gave him through the author's native city and his personal history there. We were delighted to read that one of Pamuk's favorite places is Vefa Bozacısı, which is one of ours too (and also a stop on the Old City culinary walk). After our first taste, we were not quite ready to sing the praises of boza, a thick, almost pudding-like drink made from fermented millet. But the experience stuck with us. What is that flavor? Something like cross between Russian kvass (a fermented drink made from rye bread) and applesauce may be the best way to describe it. As it did to us, the drink may haunt you, much like the call of the itinerant boza vendors who wander the streets of Istanbul during the winter months calling out a long, mournful “booooo-zahhh.”