Tatsoi is delectable. When quickly braised with garlic in oil, it softens into a tapestry of sweet leaves and tender stems that is hard to beat. It's also beautiful, forming a swirl of little spoon-like leaves that are of a deeper green hue than nearly any other plant in the garden. And, on top of all that, they're fast: tatsoi can be harvested young within three or four weeks of planting, and fully-grown plants take under two months. They last well into the colder months and can be grown successfully all winter with protection. Once you've discovered its charms, your garden will never be without it.