8 cups cubed watermelon (seeds removed), or 1 quart watermelon juice
⅓ cup sugar
1 cup freshly squeezed lime juice (from about 6 to 8 limes)
Lime slices, for garnish (optional)
Instructions
Place the watermelon cubes and sugar in a blender and process until smooth. Strain through a fine-mesh sieve set over a large bowl; discard the solids. You should end up with about 1 quart of watermelon juice.
Add the lime juice to the watermelon juice and sugar mixture. Taste, and add ¼ to ½ cup of water if the mixture is too tart. Transfer the limeade to a nonreactive pitcher and refrigerate until thoroughly chilled.
Serve over ice, with lime slices for garnish.
Recipe by Allons-Eat! at https://www.allonseat.com/watermelon-limeade/