Separate one egg yolk and whisk the eggs. Add yogurt, yeast is diluted in warm water, without leave to rise and also added to other products. Pour the salt and sugar, and begins to add flour, it is advisable to sieve. Knead into a soft dough does not interfere much, and is divided into three balls. Leave to rise. Tray, which will bake the pita smeared with plenty softened butter. Once the dough rise, one by one the buns are rolled into a sheet with a thickness of 1 cm. Spread is also very nice, all the butter is to be used for the whole pita, and rolled gently roll. So be prepared and the remaining dough balls, by winding in the tray. Finished pita again allowed to rise while increasing volume. Then with a sharp knife cut all to pieces (slices) and each twist slightly and casually in a direction (the pita will not fall or look bad). Spread top with a broken yolk with a little sunflower oil and put in the oven, which then turns to a moderate temperature and the pita are baked.