Green fruit salad
Cut the melons in half and scoop out the seeds. Keeping the shells intact, scoop out the fruit with a melon baller. Set aside the melon shells.
Remove any stems from the grapes, and peel and chop the kiwi fruit. Thinly slice the star fruit. Core and thinly slice the apple, and put the slices in a bowl with the melon, grapes, kiwi fruit and star fruit.
Thinly pare the zest from the lime, and cut into fine strips. Blanch the strips in boiling water for 10 seconds, then drain and rinse in cold water. Squeeze the juice from the lime, and sprinkle it into the fruit. Toss through gently.
Spoon the prepared fruit into the melon shells, and chill in the refrigerator until required. Just before serving, spoon the sparkling grape juice over the fruit, and scatter it with the lime zest.