Dissolve the chocolate in milk and boil it. Thicken with starch (mixed with milk). Mix 2 egg yolks with a little sugar and stir into the pudding. Whisk the egg whites till they become stiff and fold in the pudding. Pour into glasses and let it cool down.
For the vanilla sauce scratch the mark out of the vanilla pod and boil with milk briefly. Remove from the heat. Whip 3 egg yolks with some sugar. Add them to the milk and let the sauce thicken and allow to cool down.
Add the sauce and some bananas, cut into small pieces, to the pudding.