Cut the pumpkin into thin slices. Beat the eggs and sugar until white and add half cup of oil and the milk. Continue beating and add the flour, baking powder and cinnamon until the dough gets a thick consistency. Spread a little oil in a baking pan, sprinkle with a little sugar and cinnamon. Place two layers of floured pumpkin slices in pan and sprinkle again with sugar and cinnamon. Spread another two layers of pumpkin and pour the dough on top. Sprinkle with a little oil, sugar and cinnamon.