Tzatziki is a Greek salad pretty much the same like Snejanka - Снежанка . The origins of this salads are from Turkey - oriental. So this is the balkans we are all borthers and sisters. Turkey ,Greece and Bulgaria ... we have similar food and a culters we have common history and we are a nebor countries. Doner kebab is a Turkish specialty :) originally they put tzatziki salad in the doner i think. i didnt know how exaly they call it.
Here we do somting else also it is the same thing but insted to take out the watter you add more and become like a soup. It call Tarator.