Guava and watermelon are both rich in lycopene, the red pigment that's linked to a lower risk of cancer and heart disease. Enjoy guava on its own (seeds and all), or toss it into a seafood salad or a smoothie.
Similar taste: Asian pear
Asian pears have a moist, crisp consistency resembling that of watermelon. Julienned slices add a mild sweetness to watercress or spinach salad, and a lightness to chicken-Cheddar panini.