01 -
Combine soy sauce, mirin, sugar, ginger, and garlic in a bowl. Toss in the chicken to coat, then chill in the fridge for 20–60 minutes.
02 -
Follow the package steps to boil the udon. Drain and set it aside.
03 -
Slice the mushrooms, rinse bok choy, and chop scallions—keep whites and greens separate.
04 -
Take out the chicken, but save 1/4 cup of the marinade. Heat 2 tablespoons of oil in a pan, sear chicken on both sides for 4-5 minutes. Remove, then shred into pieces.
05 -
Cook the white scallion bits in 1 tablespoon of oil until fragrant. Add the saved marinade and simmer till it thickens, then slowly pour in the broth and bring everything to a boil.
06 -
Stir the shredded chicken, bok choy, and mushrooms into the broth. Cover and let cook for 3-5 minutes until the veggies soften.
07 -
Mix the cooked noodles into the soup. Serve in bowls, topping with the green pieces of the scallions. Eat while hot!