In the mixer, beat eggs and sugar for about 10 minutes until fluffy and add the oil, cinnamon, vanilla and stir well, with a wooden spoon, not mixer. In a separate bowl, pour the baking powder in the flour, stir and add to the mixture. Lightly flour the raisins and walnuts, not to sink to the bottom of the baking pan and pour the mixture into a large buttered baking pan. Finally, peel the apples, cut into small pieces and place on top of the mixture.