Bok choy is a leafy vegetable with two distinctly different textures in its leaves from the stems at the root end. The tender leaves have a slightly sweet, earthy flavor while the stems are crunchy and mild-flavored. Bok Choy is high in fiber, minerals, and vitamins, making it a nutritious choice to add to your stir-fry. Cook up this easy recipe for bok choy stir fry for dinner tonight.