“Can you please suggest the best Turkish food restaurant, in Istanbul?”
Thanks for question by @m7mmad

As we suggested earlier:

-Asitane Restaurant is one of the most authentic restaurant. Great at Turkish Cuisine.

Close to Chora Church in Edirnekapi.

-Feriye Lokantasi: Great at Turkish cuisine. With the view you have while you dine, awesome, pure Bosphorus…

Feriye Lokantasi, nice posh restaurant, is in Ortaköy , Beşiktaş

-Çiya Sofrasi: More South-Eastern Anatolia cuisine restaurant serve delicious foods. Also not so expensive. You will have the chance to taste lots of different foods you have never saw before.