You can eat Borek any time of the day and trust me, I did.  Börek is made of thin sheets of dough, filled with cheese, minced meat and/or vegetables, baked or cooked.  The Most popular ones are ıspanaklı borek (with spinach filling), peynirli borek (with cheese filling), kıymalı borek (with minced meat filling) and patatesli borek (with potato filling). 

Where to Eat Borek In Istanbul:

Like many other items on the list (except Adana Kebap), you can find borek pretty much everywhere but here is a nice spot to try it in

Saray Muhallebicisi

Where to eat in istanbul