I follow this author. Here name is Jacki Delecki and she can be found at www.JackiDelecki.com . The recipe and photo(s) are from her newsletter. The recipe is below.
5 cups watermelon, seeded and cubed
Honey to taste
Juice of one lemon or lime
2 cups sparkling water
Fresh mint to garnish
Process the first three ingredients in a blender until smooth. Strain.
Pour over ice, distributing evenly.
Top with sparkling water.
Garnish with mint.