To close the sandwich, bring in all 4 corners of the nori seaweed like an envelope and then bring in the cling film to hold it all in place. Flip the sandwich so that it is bottom side down, whilst you repeat all the steps above for the second sandwich.
When you are ready to eat, without opening the cling film place the sandwiches on a chopping board and cut horizontally across with a sharp knife. Open up the sandwich the reveal the delicious fillings inside. Add a bit more curry sauce at this stage as you desire.
Once you have nailed this approach, onigiri sandwiches are fantastic with lots of difference fillings, great with leftovers, and colourful vegetables. Prawn and avocado, katsu cod, egg mayonnaise, its all delicious! The more colourful and varied the better.