Heat oil in a Dutch oven or large pot over medium heat.
1 tbsp neutral oil
Add the mushrooms, shallot, green onions, and the bok choy. Season with white pepper and soy sauce or tamari. Sauté for about 7 minutes.
7 oz beech mushrooms, 2 baby bok choy, 1 shallot, 5 green onions, ¼ tsp white pepper, 1 tbsp reduced sodium soy sauce or tamari
Make a well in the center of the pot and add the miso to it. Mix with the vegetables and cook for about 1 minute.
¼ cup light yellow miso
Add the broth and the firm tofu and cook on low for 15 to 20 minutes. Note: if you're using silken or soft tofu instead of firm, add it at the end of the cook time instead.
8 cups vegetable broth, 14 oz firm tofu
If you’re adding cooked noodles, add them to the pot about a couple of minutes before the soup is done.
Cooked udon noodles or other variety
Taste for seasoning and serve with optional chili oil.
Spicy chili oil