I think the trick to 'diet bentos' is to use lots of vegetables! I used most of the same as you can see in the picture.
In the left bento box are rolled ham slices with some slivered carrots and lots of alfalfa sprouts.
In the silicon cup is some vegetables I kept back last night from cooking the "Yasai Itame" for this morning. I blanched the vegetables together in salted boiling water, mixed them with a dash of shoyu, pepper and sesame seed oil. I bought some Jackfruit yesterday so I skewered some with my new picks!
In the right bento box, I filled one and a half mini croissants with more alfalfa sprouts, some slivered carrots rolled in thin slice of ham with a dash of mustard. More cherry tomatoes to accompany the sandwich.