National Nutrition Month March - Get Your Plate in Shape?. A great time to highlight 2 powerhouse foods: kale and potato. As the theme for March 2012 National Nutrition Month is "Get Your Plate in Shape". Benefits of Kale is: This food is low in Saturated Fat, and very low in Cholesterol. It is also a good source of Dietary Fiber, Protein, Foliate, Iron, Magnesium and Phosphorus. Potato Benefits: The Potato provides two key nutrients that Americans are lacking ? Fiber and Potassium.