For the crumble dough, knead all ingredients well. Form the mixture into a roll and let it rest for 1 hour in a very cold place, wrapped in foil (30 minutes in the freezer is best). The dough should become very firm.
Then roughly grate the crumble dough with a vegetable grater onto baking paper and bake at 160 °C convection oven until crispy.
Fill vanilla ice cream, applesauce and crumble into dessert glasses in layers. Pour the whipped cream into a piping bag and pipe decoratively on top.