This casserole is simple and delicious, and makes a perfect snack during a picnic (bento anyone?)—you should use it as a basic idea for a casserole, since the pasta sauce is the stable and the most important piece of the meal. It's also a very tweak-able recipe! :-)
I think life is too short to keep the frozen salmon in the fridge! :-) So I made a teriyaki salmon bento, which was so fast to cook, that I had too much idle time in the morning... Just be careful not to overcook the teriyaki sauce, because it may have a burnt taste. Also, optional lotus root slices will keep the fish tender and juicy for the time when you can finally devour every last bit of it ;-)
Tuna paste is ridiculously easy to prepare and makes a great no cooking bento, cutting the preparation time to less than 20 minutes, including rice cooking time! Now, that's what I would call cooking on the go! You can also use the tuna paste for a great tasting onigiri or sushi.
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.