Celtuce, or Stem Lettuce, is a unique vegetable cultivated for its thick, swollen stem rather than its leaves. The outer skin of the stem is peeled away to reveal a crisp, tender, and succulent interior. Its flavor is mild, nutty, and subtly smoky, often compared to a mild asparagus or cucumber. It is a prized ingredient in Chinese cuisine, typically sliced and used in stir-fries or pickled. The leaves are also edible but more bitter.