Enjoy restaurant-quality miso soup at home. You will need a coffee plunger for this one.
Soak the clams in water for half an hour, to ensure they are fully purged of all sand and grit.
Place the white miso, shiitake, kombu, bonito flakes and soy sauce in the coffee plunger. Pour in the boiling water and give it a good stir to allow the miso to dissolve. Leave to steep for about 7 minutes. Give the miso one last stir, then press the coffee plunger down gently.
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