AA Choy stalks and leaves. Latin name: Lactuca sativa. Also known as: Taiwan lettuce, AA Chop Xin, stem lettuce, asparagus lettuce, celery lettuce, celtuce, wosun.
Flavor: The leaves are similar to romaine, while the stalks taste a little like cucumber
Texture: The leaves and inner stalk are tender like lettuce; discard the outer stalk.
Best cooked: Stir fry the leaves. Same for the stalks, or you can pickle them. If you're cooking the stalks, peel the outer skin first.
Available: Year-round, but best around late spring/early summer.