Step 1

Cook the udon noodles according to the package directions, drain and set aside.

Step 2

In the meantime, in a medium pot, bring the stock to a boil. Lower the heat to medium and add the carrots and cook until the carrots are crisp-tender, 1 to 2 minutes. Add the mushrooms and snow peas and cook until slightly tender but still bright green, about 1 minute.

Step 3

In a medium bowl, add the miso paste. Add a ladleful of hot broth. Whisk until the miso is completely dissolved, then pour the entire miso mixture into the pot with the soup. Do not boil the soup with the miso, as the miso will become gritty. Stir in the noodles and the green onions.