Add the udon and cook according to the package instructions. Remove from the heat.
2 servings pre-cooked udon noodles
Transfer the udon and broth to bowls, then add the cooked beef on top.
Sprinkle with spring onions and a few slices of narutomaki before serving.
spring onions, Narutomaki
Notes
Let's proceed in order for this recipe: ideally, I would first recommend preparing the toppings by slicing the spring onions and the narutomaki. That way they will be ready to use when serving and you will keep the Niku Udon nice and hot at the same time.