Prepare fruits: peel and cut apple, if you use berries- peel them from seeds. Separate yolk from the egg white. Rub the yolks with sugar,vanilla sugar, salt, milk and flour , knead a dough without lumps. Beat egg whites until soft peaks form. Add apple(or berries) in the dough and gently add whites. Heat the oil in the pan. Make 3 pancakes, sprinkle with sugar and serve immediately.