We use almost the same recipe for rice as Cailin and fill it with whatever I have in the house

tuna & avocado
Avocado, cucumber, salmon
prawn, avocado, lettuce

We also go to Asian grocers & pick up some Inari pockets which are bean curd pockets & you stuff them with the sushi rice.... they are sweet & yum. And we pick up salmon roe to put in the sushi.