'Sushi' sandwiches

I was randomly clicking from link to link today and found this sandwich idea.  It reminded me of cheese rolls.  I guess rolling sandwiches works best when the filling is very sticky - like the mixture in cheese rolls or peanut butter.  A jam (cranberry sauce)/cream cheese mixture might also work, as well as cream cheese and savoury flavours.  Marmite should also work nicely, but the great Kiwi flavour of 'Marmite and chip sandwiches' might just take things a bit too far from the orignial bento concept!