Mix all the ingredients for the chia pudding and let it soak in the refrigerator for at least an hour (or overnight). Stir occasionally.
Put all the ingredients for the chocolate pudding in a powerful mixer and puree until creamy.
For the nice cream, puree the frozen banana and strawberry pieces in a powerful mixer. If you like, add a little sweetener or 1 tablespoon milk to the nice cream.
For the layered dessert, layer the individual components alternately in two glasses.
Garnish the glasses with cut strawberry pieces and cocoa nibs and serve.