Get a chinese or spring cabbage, roll the leaves together and chop really thinly, put it in the oven to dry it out completely but dont cook it, then deep fry it for about 45 seconds, and a generous pinch of salt and sugar and for a more realistic "seaweed" add a little pork floss from your local asian supermarket, even without the pork floss i find this recipe is the closest thing to buying it from your supermarket.