Preparation Cut watermelon flesh into 2-inch chunks and discard rind. Purée one fourth of watermelon in a blender with 1 Tbsp sugar, 1 tsp lemon juice, 4 cups ice, and a pinch of salt. Strain through a fine-mesh sieve into a large bowl, discarding solids. Make 3 more batches. Add sugar to taste if desired and serve over ice. Cooks' note:Watermelonade can be made 1 day ahead and chilled, covered. Drink will separate; re-blend before serving.
Preparation Cut watermelon flesh into 2-inch chunks and discard rind. Purée one fourth of watermelon in a blender with 1 Tbsp sugar, 1 tsp lemon juice, 4 cups ice, and a pinch of salt. Strain through a fine-mesh sieve into a large bowl, discarding solids. Make 3 more batches. Add sugar to taste if desired and serve over ice. Cooks' note:Watermelonade can be made 1 day ahead and chilled, covered. Drink will separate; re-blend before serving.