Oh my, this one is both a looker and tastes amazingly! :-) This bento idea is based on the basic tamagoyaki recipe, so feel free to use your favorite ingredients: champignons or chanterelle mushroom, herbs, different kinds of onion, bacon bits, ham shavings etc. Go crazy! :-) It's also a very good side dish!
Bento is not only rice, but also other ingredients, like... pasta. This recipe came to life when I had some uncooked beef left-overs and just wondered what to do with them. Cooking them as a part of bento was a great idea!
You can buy thin beaf slices in some grocery shops or butchers. They may be called minute steaks or quick steaks and are a great ingredient that you can use to make a quick donburi (a rice bowl with meat and vegetable toppings). It's so fast to prepare, that you can do everything in the time it takes to cook the rice!