Makes about 2 quarts.
8 cups cubed seedless watermelon
1/2 cup fresh lime juice
3 tablespoons of sugar
sparkling or soda water
In a food processor or blender, puree cubed watermelon until smooth. Add
lime juice and sugar; process until all ingredients are combined. To serve,
fill a glass about 2/3 with the "base" of the spritzer. Fill
the remaining 1/3 of the glass with sparkling water (leaving enough room
for ice). Stir and add ice.
From: Ward Street