This stuff is like turkish salsa but way spicier and better. Made with tomatoes, peppers, onions, and enough chili to make you sweat. Every kebab place has it but tourists usually skip it

Put it on your doner, dip your bread in it, eat it with cheese. The best version i found is at develi restaurant - they make it fresh daily. Most places tone it down for tourists so ask for cok aci if you want the real heat level