Here are all the ingredients.
Put the water, flavoring ingredients and the ingredients marked ★ in a pan and simmer over low-medium heat. Adjust the flavor to taste.
When it tastes the way you like, add a little pinch of salt to nail the flavor.
When the onion is transparent and softened, swirl in the beaten egg, add the mitsuba and so on, bring to a boil rapidly over high heat then turn the heat off! Let it rest for at least a minute.
Spoon it over a bowl of hot hot rice and you're done! It doesn't even take 10 minutes to cook.