Sparkling Watermelon-Lemonade Spritzers
1 (6-pound) seedless watermelon, cut into 1-inch chunks (8 cups)
1 can (12 ounces) frozen lemonade concentrate
1 can (12 ounces) pink lemonade concentrate
Chilled seltzer or club soda
Lime slices, for garnish
Puree watermelon, in batches, in blender until smooth. Pour into a 2-quart pitcher. Stir in lemonade concentrates until completely melted. Cover; refrigerate overnight.
When ready to serve, fill 10-ounce glasses with ice cubes and 1/2 cup of the watermelon mixture; top with seltzer or club soda and garnish with lime slices.