- 6 Cups diced (1-inch) seedless watermelon (from about a 5-pound melon)
- 10 Ounces lemon juice, preferably organic
- 6 Cups water
- 3/4 Cups cane sugar
- Mint sprigs, for garnish
Working in batches as necessary, purée the watermelon and lemon juice in a blender until smooth and transfer to a large container. Add the water and sugar and stir until dissolved. Pour over ice in tall glasses, garnish with mint and thin slices of watermelon, if desired, and serve.