Chop the green onions finely and set aside.

In a bowl, whisk the eggs together with mirin and tuna sauce until well combined.

Add the chopped green onions to the egg mixture and mix gently.

Heat a non-stick pan over medium heat and add a small amount of cooking oil.

Pour a thin layer of the egg mixture into the pan and cook until slightly set. Roll the egg gently to one side.

Repeat the process by adding more egg mixture and rolling until all the mixture is used.