How to Make It
In a small bowl, combine frozen strawberries with sugar and let sit for at least 10 minutes. In a blender, combine frozen lemonade, ice, lemon zest, and ½ cup club soda. Pour into separate pitcher. In the clean blender, combine strawberries and ¾ cup club soda. Layer strawberries and lemon slush in cups. Stir to gently combine. Garnish cups with a lemon slice.