Mix apples with 2 tbsp sugar 1 tbsp cinnamon put them in the oven for 10-15 minutes or microwave for 4-5 minutes on full power. Then drain them if you have placed a lot of juice. Separate yolks from egg whites. Beat the egg whites with a mixer of snow. Add the sugar and beat until sugar is melted. Add the egg yolks with yogurt soda dissolved in it and the oil, after becoming homogeneous mixture, add in stirring constantly with a wooden spoon and flour. Finally put cinnamon, coconut, 4 tbsp ground walnuts and essence. Bake in a buttered baking dish and a preheated oven at 200C degrees until ready. Select a wider pan and spread the mixture well not very thick layer because plunk a lot - my rectangular 40h27 cm. Meanwhile, beat three egg whites snow. Once the cake is baked, add the beaten whites to apples and spoon walnuts. Mix well. Apply this mixture cake and return to oven for about 10 minutes until the egg whites turn pink to 150C degrees only from the top.