empty vanilla pod
First pour the cream into a saucepan together with the sugar and the cleaned banana. Puree this with a hand blender. Then add the egg yolk, the corn starch and the empty vanilla pod. Now while stirring cook it to the desired thickness. Then add the white chocolate and mix this. Now put it through a sieve, cover it with plastic foil and let it set in your fridge. After that give it a good mix with a whisk. Then put it in a piping bag and keep it in your fridge for later.