In a bowl mix the sugar and the cinnamon for the pan. Cut the pumpkin in thin slices. Beat the eggs with the sugar until the mixture turns white and add the half cup of oil and milk. Continue beating the eggs and add the flour, the baking powder and the cinnamon until the pap becomes stiff. Lubricate a pan with some oil and sprinkle with some sugar and cinnamon. Place 2 layers floured slices from pumpkin and sprinkle again with sugar and cinnamon and place 2 more layers with the pumpkin. Pour the pap over the layers with the pumpkin. Finally sprinkle with some oil, sugar and cinnamon. Bake it at 200° C for 40´.