Peel and chop the rhubarb and sprinkle with sugar. When it has drawn juice, add the vanilla sugar, orange peel and 2 tablespoons of water, briefly bring to the boil and steam for 3-5 minutes. Let cool down.
Crush 1 banana, cut the other into slices and mix both with the cold rhubarb compote. Whip the cream until stiff and fold in carefully.