Whether or not you're already a fan of leafy greens, you'll become an avid devotee once you've stir-fried kale, bok choy and Napa cabbage. Tossed and tumbled quickly in a sizzling hot wok with a little oil, these nutritional powerhouses gain sweetness and flavor. In fact, leafy greens are among the healthiest vegetables you can eat, packed with phytochemicals, beta carotene, fiber and Vitamin C. Consider transforming a traditional basil pesto into a kale pesto with walnuts and parmesan cheese, or stir-fry a French-style mustard chicken with Napa cabbage. If you want a deceptively easy way to vary your leafy green repertoire substitute the baby bok choy in coconut curried shrimp with swiss chard. Once you get stir-frying the possibilities are limitless.