Tamagoyaki is a great and easy to make bento ingredient. It's savory taste goes well with vegetables and diary ingredients, it packs a reasonable amount of protein and will satisfy your hunger for a long time. It's good served warm, as well as cold.
Today was one of these days that my coffee needed a coffee... And I really couldn't make myself cook in the morning. So, the vegetarian bento was made! It's fast, it's simple, and it tasted great. Consider that a fancy salad for lazy days.