Beat two egg yolks and one whole egg with sugar. Add the oil, yoghurt with dissolved into it soda and vanilla. Thus prepared dough is spread in a baking dish greased with sunflower oil and sprinkled with flour and bake in the oven heated to 200 C. The baked base is removed from the oven and cool for about 5 minutes. Spread with jam and beaten 3 tbsp sugar solid whites. Sprinkle with the walnuts and returned to the oven to finish cooking until slightly pinkish egg white.