Weigh out all ingredients. Make sure water is around 10-18˚C.
Dilute the yeast in small amount of water and mix in the sourdough starter.
Mix flour, nori, plankton powder and water and leave to hydrate for up to 30 minutes. Start kneading the dough for 5 minutes. Add the yeast mix and knead for another 5 minutes.
Add salt and knead into an elastic dough another approximately 10 minutes.
Cover the dough with clingfilm and give a bulk rise for two hours.
Shape the dough into 200g size balls and cover with clingfilm. Now cold ferment the dough for 8 to 72 hours. The longer you let your dough ferment the tastier and easier it will be to digest.