Begin by placing the sliced strawberries into a blender. Blend until they reach a smooth consistency. If you encounter difficulty blending, add a splash of cold water to aid the process.
In a medium mixing bowl, pour in the freshly squeezed lemon juice. Gradually add the granulated sugar, stirring continuously until the sugar fully dissolves, creating a refreshing citrus base.
Once the sugar has dissolved, incorporate the strawberry puree into the lemon juice mixture. Stir thoroughly until the two blends harmonize beautifully.
Transfer the combined mixture into the blender and add the ice cubes along with the remaining cold water. Blend on high speed until you achieve a smooth, slushy texture. If the mixture feels too thick, don't hesitate to add a little more water and blend again until desired consistency is reached.
Taste your frozen lemonade and customize the sweetness by adding additional sugar or a splash more lemon juice according to your preference.
Serve your delightful frozen lemonade by pouring it into chilled glasses. For an extra touch, garnish each serving with fresh mint leaves, if desired.