How to make
Start by making the filling. Peel and cut the apples into very small cubes. Sprinkle them with a little sugar and place in a preheated 390°F (200 °C) oven to bake for 20 min.
After you take them out of the oven, sprinkle with the cinnamon and stir, leave aside to cool.
For the cake, beat the eggs with the sugar, subsequently add the oil, milk and the premixed together baking powder and sifted flour.
Smear a form with a little oil and sprinkle with flour, distribute 1/2 the cake mixture evenly and sprinkle with 1/2 the ground walnuts.
Distribute the apple filling on top and sprinkle with the remaining walnuts. Cover the filling with the other 1/2 of cake mixture.
Put the form in a preheated 340°F (170 °C) oven and bake about 60 min. Invert the ready cake and serve in a suitable plate, sprinkled with powdered sugar.