Rinse the seaweed in 5-10 waters, rinse all the sand. You can boil it (get ready - the smell will not be pleasant!), but I don't boil it, in my opinion, it's much tastier this way. Cabbage can be chopped smaller, I do not chop, I like to wind it on a fork, like spaghetti. Dry the cabbage, pour the cooled filtered broth with vinegar and leave to infuse for several hours (I left it overnight).
In the morning, strain the broth, and the cabbage is ready to eat! You can fill it with what you like, I love it, natural.
In the photo, cabbage in marinade.