Here's one more item for your bento. It is a quick-prep Japanese dish.
I needed one more item for my bento, so I quickly whipped up one from whatever was in my fridge.
Thanks to the chikuwa, you don't need soup stock. How easy. You can add mentsuyu as seasoning, if you like, but it's easy to just use soy sauce and sugar.
Enjoy Japanese food around the world.