You can pipe small rosettes of cream around the outside, between the puffs, as a finishing touch.
Refrigerate before serving.
Remarks
This recipe needs a lot of work, so it is a good idea to be organised and to prepare the elements that can wait in advance, as far as possible: puff pastry circle, confectioner's custard and choux puffs (you can even fill these).
Once you keep to the basic principle (puff-pastry base, choux pastry around it and cream filling) you can vary this in many different ways: by changing the cream, for example. Give free rein to your imagination.