Lo from Slovenia. Just found about bentos recently and just now finished eating my first one ;) Must say I love it.
Though as I'm lazy as hell in the morning I prep mine in the evening.
So what I had today you ask?
Some sticky rice(finally managed to get some sushi rice around here), left over chicken breast(re-marinated in teryaki, balsamic vinegar, sesame oil and some other spices), 1/4 of a zucchini sliced ~1cm thick and quickly sauted for about 30s on each side just to get it heated through and through, and a bit of fresh salad added in the morning.