Nori (typically Porphyra yezoensis) is closely related to laver, which has a purplish black color. Indigenous to the North Atlantic, laver is especially good dry-roasted to bring out its nutty flavor. It can then be crumbled and used as a nutritious condiment over soups, salads, or grains. Laver has a long history in the British Isles, where it is combined with rolled oats and fried as a breakfast bread.