Sword lettuce, also known as aa choy sum, pointed leaf lettuce, and arden lettuce, is a loose-leafed vegetable in the daisy family. Sword lettuce is crisp and tender with a mild bitter flavor that is aromatic, nutty, and vegetal much like almonds. The entire plant is edible and popular in Taiwan and Southern China. Celtuce has a nearly identical flavor to sword lettuce but is grown for the stem rather than the leaves.
Uses: Use sword lettuce raw in salads, in stir-fries, or grilled: the mild nutty flavor works as a wonderful backdrop to foods that are light or hearty.