Spreading sheet and leave them aside. Stir yogurt with baking soda, add the eggs and the oil. A crust put the mixture, while leaving little for last, then add the feta cheese - sliced ​​or grated, I personally shred it. Roll and arrange in a greased baking dish until end peel - should become like a snail. When you fill a pan pour the rest of the eggs, spread with the butter and put to bake at 180C degrees until golden. When ready sprinkling with a little water and turn until soft cloth with the banitsa.