For the best taste and color, use a red-fleshed Hawaiian papaya for this exotic, lip-puckering taste of island summer. Papayas are loaded with papain, a digestive enzyme, so this smoothie is a good dessert to settle stomachs after a substantial meal.
Ingredient Notes: Grenadine is a red syrup (originally flavored with pomegranate juice) used to color and flavor drinks. Look for it in the bar-mix section of your supermarket.
Guava nectar is available in most markets, with the juices or in the Latin American section.
1 1/2 fruit