[sidebar]1. Escarole is mild in flavor but high in folate. It holds up to heat, so mix it into soup or a warm, cozy pasta dish. 2. Beet greens, slightly sweet and earthy, are bursting with calcium and potassium. They wilt beautifully, briefly saute and add to an omelet. 3. Kale is loaded with potassium and lutein. Try this bitter leaf raw with a dressing of shallots, lemon, olive oil/and Parmesan. 4. Bok choy has crunch and calcium. Go raw in a slaw or pair with noodles and Sriracha. 5. Mustard greens are vitamin K kings, stellar at strengthening bones. Saute the tangy, peppery leaves with bacon and garlic. More from Prevention: What’s Healthier: Spinach Or Kale?