Preheat oven to 180C.
Roll the pastry out to a thickness of about 2mm (like in a pre-rolled sheet), don’t worry about a neat shape, mine looked like an amorphous blob!
Slather on a thin layer of Nutella with a spatula.
Then spoon on the mashed banana to form a thin layer too.
Cut the pastry into strips, roughly 1 cm wide or slightly more.
Gently roll each strip up and place on a baking sheet lined with baking paper.
Brush each pinwheel with egg wash.
Bake for about 20 – 22 minutes until baked through and golden. This timing is based on lengths of about 13 cm if shorter lengths are used decrease the baking time or if longer you may need to increase the time.
Once baked, place pinwheels on a wire rack to cool.