Whisk warm water, sugar, and yeast in a large bowl. Cover with a dish towel and let rest for 10 minutes to activate the yeast.
Add warm milk and room temperature Greek yogurt to the bowl. Whisk until smooth. It is critical that the milk is warm and the yogurt is room temperature - otherwise your yeast will not rise.
Add in the flour in 1 cup increments, mixing in between each. Add the salt and garlic. The dough will be thick and hard to mix. Knead it for 3-4 minutes (with your hands, or with the dough hook of a stand mixer).
Cover the bowl with a dish towel (or plastic wrap) and place somewhere warm, leaving it to rise for approximately 1 hour, or until doubled in size.
Once doubled, dump dough onto a lightly floured surface and divide into 12 roughly equally sized balls.
Roll each dough ball out to about ½cm thick. I find it's easiest to roll 3 or so at a time.
Melt butter in a large frying pan (or better yet, a cast iron pan).
On medium heat, fry each piece of dough until golden brown on each side.
Brush with melted butter and sprinkle with salt to serve.