Apples grate grater the walnuts (provided nuts) are ground in large pieces. In a large bowl whisk the eggs, add the sugar, the oil, yogurt, which is effervescent baking soda. They add the flour, oatmeal mixed with baking powder in them and vanilla, put and ground walnuts. Everything is well mixed and to the mixture was added with grated apple cinnamon therein again, and the mixture was stirred to give a slightly more dense than that of the known cakes. Baking pan is coated with the butter and dusted with flour (or use baking paper) and the mixture is poured into it. Bake in a preheated oven rather low (around 180-190 ° C) for about 45 minutes. Optional finished cake can be sprinkled with powdered sugar.