Just like this, with square sheets of seaweed pressed and sun-drying on a row of wooden rolling mats. In Korea, I eat more tuna kimbap–seaweed rolled up with rice, radish, sesame leaf, and a spoon of mashed-up tuna–than sushi, but it all starts with that dark algae plucked from the cool Asian waters.
.
Seaweed drying on Ulleungdo Island
Interesting process, and I bet the kimbap is good! You will
have to show me how it is done, when you come home.