Ways to incorporate natto in school lunches?

Hi! So I bought a 3-pack of natto and still have two left (it's actually not that bad!) and the first time I tried it in breakfast (plus I got crossiants I could eat instead!) so I want to use one pack for lunch. I need a recipe that is single serving and not too hard, and something on the small side since I have a small appetite and am a petite teenage girl. I have typical American ingredients at home but I also have nori, silken tofu, miso paste and leeks, idk if those are compliments. This lunch needs to be as to fit in a lunch box, as I am in a summer camp, and I also can't heat anything! Maybe a sandwich? Also please make it healthy...I'm trying to watch my weight a little... Thanks so much, sorry if I made anything unclear!
Edit

How about making a natto maki?
Here's a cute amateur video to help you if your not sure how it's done.