A variant of sushi without all the carbs in the rice. Feel free to use whatever fish you like, provided it is sashimi grade if you will be eating it raw. Smoked salmon is a great substitute here. You could even make a thin egg pancake and slice that for a vegetarian version.
Don’t be tempted to overfill these too much or they will be hard to roll. They will also be too large to eat in one bite.