
Bring a large pot of water to a boil.
Add the udon noodles and cook according to package instructions (usually 10–12 minutes for dried, a couple minutes for fresh/frozen). *3
Stir occasionally to prevent sticking.
Once cooked, immediately drain and rinse the noodles under cold running water to stop them cooking further.
Rub the noodles gently while rinsing to remove excess starch.
For extra chill, place noodles in a bowl of ice water for 1–2 minutes, then drain well. *4
Dilute 1/2 cup of kaeshi with 1 1/2 cups of dashi and chill until ready to serve. *5
Chop scallions and myoga finely. Grate fresh ginger.
Arrange toppings on a small plate so each person can add them to the dipping sauce as desired.
Place the cold, drained noodles on a bamboo mat (zaru) or plate.
Sprinkle with shredded nori for garnish.
Arrange toppings on a small plate and serve with the dipping sauce.