3 cups cubed seeded watermelon, frozen
2 Tbsp. sugar
2 Tbsp. fresh lemon juice
3 cups chilled prosecco or other sparkling wine
Place watermelon, 2 Tbsp. sugar, lemon juice, and 1 cup wine in a blender; process until smooth. Pour about 1/3 cup of the mixture into each of 8 glasses. Top off with remaining wine.