Watermelon Limeade

Directions

1. 1
   Place half of the watermelon cubes in a blender and process until smooth. Strain through a fine-mesh sieve set over a large bowl; discard the solids. Repeat with the remaining watermelon cubes. You should end up with about 1 quart of watermelon juice.
2. 2
   Add the lime juice and sugar to the watermelon juice, and stir until the sugar has dissolved. Taste, and add more sugar if necessary. Transfer the limeade to a nonreactive pitcher and refrigerate until thoroughly chilled.
3. 3
   Serve over ice in tumblers, with lime slices for garnish.