I recommend making this quickly and stuffing it into gaps in your bentos. If you make the rolls thin, they'll be easy for kids to eat!
This is a perfect side dish for filling gaps in bentos when you have leftover leafy greens in the fridge!
You can make this with the following leafy vegetables too: Bok choy; komatsuna; lettucce, spinach; etc.
Enjoy Japanese food around the world.