Creating your own Japanese bento or lunch box, as you may have seen from my other bento recipes, is not as difficult as you think. Having mastered those dishes you might want to try and prepare something a little more elaborate for a special occasion. This bento box has a couple of slightly more advanced sushi recipes and would be perfect for a birthday lunch. There is a bit more work involved so it will take a little more time, but the recipes can be still be prepared in advance the night before and then finished and assembled in the morning.
It is absolutely essential to use sushi grade fish, which is suitable and safe for raw consumption, for the tuna sashimi and salmon and avocado maki. Speak to your local fishmonger or buy it online from a reputable supplier such as Kazari. You will also need a sushi mat to make the maki rolls. There are two different types of maki here, hosomaki which is rice rolled around around a filling, wrapped with a sheet of nori, and uramaki, where the rice is on the outside of the nori roll. If you have never made sushi before, you might like to practice with some rice to get the hang of the technique.