To make the udon soup, bring the dashi and soy sauce to a boil. Taste it and add more salt if necessary. Set this on a back burner over low heat to keep it warm. Put another pot of water on to boil for the noodles.
2 1/2 cups dashi, 2 tablespoons soy sauce, 1/4 teaspoon salt
To make the beef, add the dashi, sake, soy sauce, sugar, and white parts of the scallions to a frying pan and bring the mixture to a boil.
1/2 cup dashi, 2 tablespoons sake, 2 tablespoons soy sauce, 1 tablespoon sugar, 60 grams scallions
Add the beef and separate the sheets of meat, so they don't clump together. Turn down the heat to maintain a gentle simmer, cook the meat, stirring until it's tender and there is almost no liquid remaining (about 15 minutes).
225 grams beef
Add the udon noodles to the boiling water based on the time they need to cook. For example, if your noodles take 2 minutes to cook, you'll want to add them when the beef is 2 minutes away from being done.
2 servings udon noodles
When the beef is tender, add the scallion greens and stir them in.
Split the soup between two bowls.
Drain the udon and split the noodles between the two bowls.
Finish the Beef Udon by topping both bowls with the meat and pouring over any remaining sauce in the pan. Garnish with shichimi togarashi to taste.
shichimi togarashi