Make slices in the pineapple halves, scooping out chunks of the fruit. Pour the juice into a bowl. Stir in honey and whisk until it’s combined.
Cut melons into chunks.
Put melon, blueberries, grapes, and pineapple into a separate bowl. Pour the dressing over the fruit and toss it to combine.
Spoon the fruit into both of the pineapple shells, pouring on a little more dressing if there’s some left in the bowl. Garnish with mint leaves and serve!