I always thought that this was specifically Dutch (boerenkool) but on Wikipedia it says it is the basic nourishment of the East Black Sea region. Does anyone know where I can buy this?

 I think you can find it easily  from bazaars and greengrocers. Its "Kara Lahana" not hard to find it in Turkey. Afiyet olsun  

Not sure but you may find it in Bazaars. By the way there is kind of it peculiar west black sea region called "mancar", i dont think many Turks heard about it ...

Thanks Once I found it I will give the dutch recipe for kara lahana with potato Though it is officially eaten with pork sausage, dutch köfte will do the trick.

You serve it with gravy? When can I come?

Dutch love food!

why did that message go twice?

Probably because you didn´t go back in your browser. But no worries, I deleted the double one.

thx.You have the powers.

 Yessss But still, my gravy isnt my mom´s gravy

But you are more than welcome to come