Kombu, dried shiitake mushrooms, miso, and silken tofu are available at Asian and health-food markets.

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Ingredients

Ingredient Checklist

Directions

Instructions Checklist
  • Combine kombu, mushrooms, and 2 quarts water in a large Dutch oven. Bring to a boil, then reduce heat and simmer 20 minutes. Discard kombu. Remove mushrooms; when cool enough to handle, thinly slice and return to simmering liquid. Whisk in miso.

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  • Add sweet potato to poaching liquid and cook, adjusting heat as necessary to maintain broth temperature at 190 degrees on a thermometer, until fork-tender, about 15 minutes. Season with salt. Remove from heat and stir in tatsoi. Gently add tofu, trying to not break pieces.

  • Meanwhile, bring 1 1/2 inches water to a simmer in a large, deep skillet. Crack 1 egg into a small bowl. Holding bowl just above surface of water, gently pour egg into skillet. Repeat with remaining eggs. Poach, adjusting heat as necessary to maintain a simmer, just until whites are firm and yolks are still runny, about 3 minutes. With a slotted spoon, transfer eggs to a clean towel. Divide soup and vegetables among bowls; add one egg to each. Season with pepper and serve.

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