This is a bento I made for my husband. He grew up in the era of caker cooking: http://cakercooking.blogspot.ca/. I am not knocking mid 20th century Canadian cuisine, as I hate to think what Brits were eating then with the arrival of the supermarket! So when he was craving bean salad, he opened up about five cans, made a dressing with copious amounts of white vinegar, canola oil, and sugar, and called his involvement in the kitchen a day. He made a giant bowl of the stuff, and it took him a few days to eat it. It was his default side dish!
I placed some of the salad over cooked rice, and placed red peppers and blueberries in silicon cups for him to graze on through his day of work.