For close to €15 you get a medium sized potato with very scarce ingredients. I could even count the corn, and there was less than a teaspoon of pesto, I could barely see it. Serving this as kumpir in Turkey would be outright criminal.
The service was also nonexistent, they have table service for Turkish people, but they thought we weren't Turkish so they didn't even bother.
All in all, I would be embarrassed to set foot in there a second time as a Turkish person, give kumpir the justice it deserves. In the meantime, you can have way better kumpir in Antwerp, or way better snacks at Keyserlei.