First, peel the rhubarb and cut into small pieces. Steam with sugar and apple juice in covered saucepan for about 8 minutes until soft. Allow to cool.
Stir milk and cornstarch until smooth. Add sugar, yolks and vanilla flavoring.
Bring everything to the boil once briefly while stirring.
Allow to cool a little in a cold water bath while stirring.
Whip the egg whites with salt until stiff and fold into the vannilla cream.
Arrange the compote with the cream and serve.