Start by heating 700 ml dashi stock over medium-high until boiling.
While you wait, mix 200 g ground chicken, 1 egg, ½ tbsp yellow miso paste (awase), ½ tsp Japanese soy sauce (koikuchi shoyu), 2 tbsp cornstarch, ½ tsp grated ginger root, and 1 clove grated garlic in a bowl to make the meatball mixture.
Once the dashi is boiling, add 4 fresh shiitake mushrooms, ½ Japanese leek (naganegi), ½ tbsp dried wakame seaweed, 1 leaf Napa cabbage and 30 g thin glass noodles (harusame).Note: If your glass noodles require less cooking, add them later.
Reduce the heat to a simmer and use two tablespoons to scoop the chicken mixture out of the bowl and into the soup, forming balls as you go. Cover with a lid and simmer for 5 minutes or until the meatballs are cooked through.
Once the meatballs are cooked through, then turn off the heat and use a miso strainer or mesh spoon to incorporate 2 ½ tbsp yellow miso paste (awase). Gently mix to disperse the miso through the soup.
Divide into serving bowls and top with finely chopped green onions, toasted sesame oil and ground black pepper. Enjoy!
Notes
Use ground chicken breast or thigh; aim for moderate fat content - too much fat causes meatballs to fall apart, too little makes them hard.
Use yellow miso (awase) or create your own by mixing red and white miso in a 50/50 ratio; alternatively, use 100% red or white miso added gradually to taste.
I used thin glass noodles made from mung bean starch, but any available type of glass noodles can be substituted.
When storing miso soup with glass noodles, the noodles will absorb soup over time. Therefore, be sure to remove the glass noodles before storing the soup.