Beat yogurt and salt together in large bowl until smooth. Gradually add flour until you have a stiff dough. Tip onto a lightly floured bench and gradually knead dough, incorporating any remaining flour until the dough is soft and only slightly sticky. Transfer to a clean bowl and stand covered 30 minutes.
When ready to cook, divide dough into 8 equal portions. Roll out thinly. Pile a small handful of cheese in the centre of the rolled out dough. Brush a little water around edges before folding over cheeses to seal. Pat cheese parcel with palm of hand until pressed together and about 5mm thick.
Heat a large non-stick frying pan over very high heat. When hot, cook cheese parcels one at a time until browned and crisp on base. Flip over and continue to cook on other side until browned. Transfer to a large chopping board and cut in half to serve. Serve with salsa as a light snack.
Tomato Salsa: Combine all ingredients in a medium bowl, stir well. Serve with cheese bread.