Prep mushrooms and vegetables.
Heat dashi stock in a pot over a medium heat.
Meanwhile, heat 1 Tbsp of sesame oil over medium heat in a separate pan. Sautee carrots and bok choy for 3-5 minutes. Remove from heat.
Once the dashi is almost boiling, add ½ tsp Japanese/light soy sauce. Separate 1 cup of dashi to a large cup. Add ginger to pot of dashi.
Next, add the mushrooms and reduce the heat to a simmer. (If using additional firm mushrooms like king oyster, place them in first and cook them a bit longer.) Simmer for 3-5 minutes or until the mushrooms have softened to your liking. Turn off heat.
Add 8 tbsp miso paste, 1 tbsp at a time, to the separated cup of dashi. For each tbsp, whisk until miso has blended with the dashi.
Mix miso/dashi blend into the soup thoroughly. Add sauteed carrots and bok choy.
Divide into serving bowls and sprinkle with finely chopped green onions.
