
Add the soy sauce, mirin, sake, sugar and water in a little bowl and stir to mix together.
Heat oil in a frying pan over medium heat and add ginger until it becomes fragrant.
Add the thinly sliced beef. When the beef colour has canged, add the sauce mixture and bring it to simmer.
Cook it for about farther 5 minutes and turn the heat off.
Place dashi stock, mirin, soy sauce, sugar and pinch of salt and bring to boil.
Once it boiled, pour the udon soup stock into a serving bowl.
Cook the udon noodles. Boile plenty of water in a large pot over high heat.
When the water boils, add the noodles to cook.
Drain the cooking water and place noodles in the serving bowl.
Top with the beef, naruto and finely chopped scallions.
Sprinkle shichimi togarashi as you like.