How to Eat a Grenadilla! grenadilla is a newcomer for us. It is a close relative of Passion Fruit, equally sweet and aromatic, equally tasty, equally full of A and C vitamins, magnesium, potassium and fiber. Excellent to ward off winter colds, she is also referred to as a nutritious bomb! Peruvian grenadillas attain a golden blush higher sugar content and enhanced flavor as they ripen. Try as a healthy topping for yogurt!