Cut the prawns lengthwise, rub all over with “Treasures of the Caribbean” and leave for 1 hour in marinade. For the pesto, place cilantro and basil in food processor. Pulse until coarsely chopped. Add pine nuts, coconut flakes, ginger, garlic and cumin, pulse some more. Stir in olive oil, coconut milk and passion fruit juice. Season with salt and pepper.
Cook spaghettini in a large pot of boiling water until done, strain and transfer on to a platter. Heat butter in a skillet, sauté prawns on each side for 3 minutes. Mix pesto with pasta, place prawns on top and serve right away.