Broccoli definitely takes the gold medal for most nutritious vegetable. This cruciferous vegetable contains more vitamin C than an orange and has more calcium than a glass of milk. In addition to minerals and vitamins, broccoli is filled with disease-fighting chemicals called phytonutrients. Sulforaphane, a phytonutrient found in broccoli, has been shown to lower the risk of many types of cancers. Try steaming or boiling broccoli and seasoning with basil, lemon or salsa for a delicious side dish. This powerhouse vegetable is a perfect addition to omelettes, salads or stir-frys.