(for the broth)
3 large scallions, trimmed
1 handful shiitake mushrooms, crushed (about ½ cup)
¼ cup crumbled dried seaweed, such as kombu or dulse (optional)
1 (1 inch) chunk of ginger, smashed and unpeeled
2 whole, unpeeled garlic cloves
1 teaspoon salt
(for the soup)
1 pound dried udon noodles (you could use fresh/frozen cooked udon)
2 tablespoons butter
1 cup chopped leeks, white and pale green parts only
8 ounces fresh shiitake mushrooms, stems removed, caps sliced in ¼-inch strips
1 teaspoon of minced ginger
2 cloves of garlic, minced
¼ cup mirin or dry sherry
½ teaspoon sesame oil
2 tablespoons of soy sauce
2 cups chopped bok choy
½ cup red or white miso
1 cup soft or medium tofu, cut in small cubes
4 scallions, finely chopped, for garnish
Shichimi togarashi or crushed red pepper flakes, for garnish
Preparation:
Step 1: Make the broth: In a large pot, bring 8 cups water to a boil over high heat. Add scallion, dried mushrooms, seaweed (if using), ginger, garlic, fresh mushroom trimmings and salt. Reduce heat to a gentle simmer and cook for 20 minutes. Strain and set aside.
3.In a soup pot, melt butter over medium-high heat and swirl to coat the bottom of the pot. Add leeks and sliced shiitake and cook, stirring, until softened, about 2 to 3 minutes. Add ginger, garlic, mirin, sesame oil and soy sauce and cook for 1 minute. Turn heat to high, add reserved broth and bring to a simmer.