Beat 3 eggs, the yoghurt and ½ of the mayonnaise. Add the crumbled feta cheese. Take 2 phyllo pastry sheets and sprinkle them with this stuffing. Roll them up.
Arrange in a greased with oil oven dish, starting from the center and going out to the periphery in a spiral. Prepare a topping of the other 3 eggs, the remaining mayonnaise and carbonated water. Pour it over the pie.
Bake in a preheated 392°F (200˚C) oven for 45 minutes.