Add the cabbage, leeks, mushrooms and noodles and pour in a mixture of sake, tamari soy sauce, brown sugar and kombu dashi (or water) to the pan and bring to the boil.
It should be cooked after 5 mins, when you can sprinkle in the watercress.
Break eggs into a serving bowl and beat gently to make dipping sauce.
Recipe by appetite magazine at https://www.appetitemag.co.uk/sukiyaki-japanese-hot-pot/