Salads offer a great way to eat a variety of vegetables, but the greens themselves also can be full of vitamins and minerals. Leafy greens are low in sodium and calories, and they are completely cholesterol free. Greens contain vitamins (A and C), folate, calcium, fiber, and phytonutrients. When picking greens, look for those that are darker green or red because they tend to have more nutrients than lighter varieties.