I first grew Chinese Kale ‘Kailaan’ (also known as Gai lan or ‘Kai laan’) in about 2006; I was really impressed by this vegetable’s speedy growth and the bounteous harvest my plants produced.  ‘Kai lan’ leaves, flower buds, and stems are all edible, but it’s the stems that provide the main harvest.  Try it raw, stir-fried, steamed, or boiled; ‘Kai lan’ is a little like broccoli.