Bento is usually the type of breakfast or the lunch Japanese would consume that consists of the leftovers or previously cooked food items.
Well, there are somethings that you need to take care of before stepping forward on preparing the bento, and that includes the checking of the food items for their current conditions. They shouldn’t be off coloured nor providing the user with foul flavours at all. When you are certain that the food items are all secure and safe for consumption, all you need to do is get a large plate and start plating the food items along with the boiled rice. The proportion should be 1:1.
Although you might think that the dish is relatively simple enough to cook that is why there is no need to seek the professional assistance, but on the bright side, you should consider taking part in the Bento making class if you happen to be in Osaka so you could have a better assessment of the overall experience.