Peel, core and dice pears and apples. Boil up with apple juice and 1-2 tbsp. sugar. Cover and simmer for 5-7 minutes.
Stir pudding powder and 3 tablespoons of water until smooth. Stir the mixed powder into the fruit and simmer for about 1 minute. Let the groats cool down.
Cut the vanilla pod lengthwise. Scratch out the pith. Mix with quark and 1-2 tablespoons sugar until smooth. Cut the pod lengthwise into fine strips for decoration. Whip cream until stiff and fold into the quark.
Layer with groats alternately in 4 glasses. Decorate with vanilla pod.