Unless gathered absolutely fresh, seaweed tends to be sold dried. It is available fresh from May to June. Carrageen, or Irish moss, is used as a vegetarian gelling agent in some processed foods.

The final installment will feature a salad that uses a “dried food of the sea,” wakame seaweed. In Japan ... who supervised the cooking aspect of the recipe and who studied with an expert ...

If you don’t live by the sea to forage your own, a friendly fishmonger might part with the fresh seaweed that oysters come ...