Here are the ingredients. If you want to make heartier portions, use 2 eggs!
Boil the komatsuna for 1 minute, squeeze out the excess water and cut into bite-sized pieces. Beat the egg and mix with the mayonnaise.
Heat the frying pan over medium heat, and coat with sesame oil. Quickly stir-fry the tuna and komatsuna, and add the bonito flakes.
Add the egg. Don't move anything around until the egg has firmed up!
Season with salt, pepper and soy sauce to finish.