Use a blender or food processor to puree the strawberries. If you’d like to remove the strawberry seeds from your final product, strain the berries thought a fine mesh sieve.
In a small saucepan over medium heat, stir together the sugar and 2 cups of the water. Bring to a boil and stir until the sugar is dissolved. Remove from the heat and allow to cool to room temperature before proceeding to the next step.
Strain the lemon juice thought a fine mesh sieve, if desired, into a 2 quart pitcher. Stir in the cooled simple syrup (the sugar and water mixture) and the puréed strawberries. Refrigerate until cold.
When you’re ready to serve the lemonade, add in 2-1/2 cups of cold water and stir. Taste and add more water if it’s too sweet.