Cut the watermelon flesh into 1 1/2-inch cubes.
Use the small end of a melon-baller (or cut with knife into bite-size pieces) to remove a scoop of flesh from one side of the watermelon cubes, creating a small cavity for the juice.
To serve, place a watermelon cube, cavity-side up, on each of 6 small plates and squeeze a little lime juice over them. Fill each cavity with balsamic vinegar. NOTE: I use a dropper to add the balsamic vinegar.
Makes 6 servings.
Watermelon Cubes with Aged Balsamic Vinegar Recipe: https://whatscookingamerica.net/appetizers/watermeloncubes.htm