A sweet, slushy drink perfect for the poolside.
In a small bowl, combine the frozen strawberries with sugar and let sit for at least 10 minutes.
In a blender, combine the frozen lemonade with the ice, lemon zest and 1/2 cup club soda, then pour into a separate pitcher.
Clean the blender (or use a different pitcher if you have one), and combine the strawberries and the 3/4 cup club soda.
Layer the strawberries and lemon slush in cups and stir gently to combine.
Garnish the cups with lemon slices.