Place flour and salt in the stand mixer bowl fitted with the hood attachment. Mix to combine.
Place milk, water, sugar and yeast in a small bowl; stir to combine. Set aside for 5 minutes, or until the surface looks foamy. Add oil stir to incorporate.
Turn on the stand mixture on low speed and slowly add yeast mixture to the flour mixture. Knead for 5 minutes, or until smooth. Place bought in a large, lightly oiled bowl. Cover with a damp kitchen towel and let it rest for 40-45 minutes, or until double in size.
Punch the air out the dough (If the dough is resistent knead by hand for 3 - 4 minutes and add 1 or 2 teaspoon of water). Divide in 8 equal pieces. Put the pieces of dough back to the bowl, cover and set aside for 10 minutes.
Preheat a grilled pan over medium heat.
Roll out each piece of dough on a lightly oil surface to 6 inches round.
Cook flatbread, in batches, for 1 - 2 minutes each side, or until they puff slightly. To keep them warm place them in a clean kitcken towel and cover until ready to serve.
Serve with Tzatziki sauce
, if you desired.