The thin crisp layers of fennel and pear are what makes this salad stand out. Arugula, a dark leafy green sometimes called rocket or rucola, is an excellent source of vitamin C and potassium.

In addition, dark green leafy veggies are one of the best cancer-preventing foods thanks to their abundant antioxidants. The leafy greens — spinach, butter lettuce, arugula and watercress ...