In a deep bowl whisk the eggs and crushed them in the feta cheese, after Stir in the yogurt, stir and set aside. In a greased pan initiate but 3-4 leaves sheet, sprinkle with sunflower oil and put the filling, so repeat until all the sheets and put all the stuffing. Before putting it in the oven, carefully cut into pieces and pour carbonated water. Then put in an oven preheated to 250-200C degrees, her watch and see that it begins to plunk too fast can decrease of 170-180C degrees to not burn.