For the pumpkin seed oil cake, beat the egg whites with half of the sugar until stiff.
Cream the egg yolks, soy milk, pumpkin seed oil, salt, vanilla sugar and the second half of the sugar.
Mix baking powder and flour and stir into the mixture, then stir in the candied orange peel.
Finally, fold in the beaten egg white and bake the pumpkin seed oil cake on a greased baking tray at 180 °C.