Prawn and Leek Soba Noodles

  • Preparation Time20 mins
  • Cooking Time40 mins
  • Serves4
  • DifficultyEasy
8 ounces soba noodles (no salt added)
One 4- to 6-inch piece kombu, rinsed well
1 ounce bonito flakes (also known as katsuobushi)
1/3 cup mirin
1/4 cup low-sodium soy sauce
1 tablespoon rice wine vinegar
1 tablespoon sesame seeds
4 heads baby bok choy
One 2-inch piece fresh ginger, finely grated
8 ounces peeled and deveined medium prawns, tails removed
1 slender leek, white part only, thinly sliced on a bias and soaked in cold water to remove grit
2 radishes, cut into thin sticks
Japanese hot pepper seasoning, such as shichimi togarashi, optional

Special equipment: cheesecloth and a fine-mesh strainer

Line a fine mesh strainer with a double layer of cheesecloth and set over a large bowl.

Bring a large pot of water to a boil. Add the soba and cook according to the package directions. Drain and rinse under cold water. Set aside.

Meanwhile, put the kombu in another large pot with 6 cups of water. Bring to a simmer over high heat; adjust the heat and simmer the kombu for 5 minutes. Remove the kombu, then add the bonito flakes to the pot. Bring back to a simmer and cook for 3 minutes. Strain the mixture through the cheesecloth-lined strainer, return the liquid to the pot and stir in the mirin, soy sauce and vinegar. The broth can be used immediately, or cooled and refrigerated up to 3 days or frozen up to 1 month.

Put the sesame seeds in a small skillet and toast over medium heat until lightly golden, about 3 minutes, swirling the pan frequently so they toast evenly. Set aside. The sesame seeds can be toasted and stored at room temperature in an airtight container for up to 2 days.

Cut the leafy tops off of the bok choy and set aside. Cut the stems into bite-size pieces. Add the bok choy stems and ginger to the broth, bring a simmer and cook until the bok choy is just tender, about 5 minutes. Add the bok choy tops, shrimp and leek to the broth, bring back up to a simmer and cook until the shrimp are pink and just cooked through, about 3 minutes.

Divide the soba among 4 deep bowls. Ladle broth, vegetables and shrimp into the bowls and sprinkle each with sesame seeds and radish. Serve with Japanese hot pepper seasoning on the side if using.

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