In a bowl, prepare the mixture for topping, which includes milk and yoghurt, eggs and crumbled feta cheese. In a greased baking dish arrange a one sheet, folding them harmonica and along the tray put them one after another. Sheet should not be too closely spaced for not become compacted the banitsa. Then in another court Heat some sunflower oil which spraying already stacked sheets. Pour on top with the mixture and arrange on top sliced ​​skinless sausages. Bake at 180-200 degrees until ready.