Mix all the ingredients with the egg except for the mayonnaise.
Heat pan over medium heat, and add the mayonnaise once it has warmed up.
Add in the mixture from step 1 once the mayonnaise has melted, and mix it all up using big stirring motions with a pair of cooking chopsticks.
Roll when the bottom has solidified, turn the overlap towards the bottom and cook for a bit, and then wrap it in cooking paper.
Cut it with a knife once it has cooled, and it is done.
This is a bento I made one day. Pork and Ginger Stir-Fry (Recipe ID:1773016).
Story Behind this Recipe
I was all out of olive oil, so I used mayonnaise that I had in my fridge instead, and it was delicious.
You should cook bento tamagoyaki all the way through to prevent food poisoning. (Especially in the summer). Wrapping it in cooking paper makes it taste like it was steamed. You can eat this half-cooked when you make this at home.