Blend the strawberries, you might need to add water to puree the strawberries.
Remove the seed from the blended strawberry by using a strainer to sieve into a bowl.
Place a small saucepan/pot over medium heat. Add sugar allow the sugar to dissolve. Turn off the heat and add the squeezed lemon juice and stir together.
Allow the mixture to cool down.
Mix the strawberry and the lemon water together.
Adjust the sugar to your preference. If you need to sieve, use a strainer to do so.
Pour into a pitcher, add ice cubes and garnish with lemon and strawberries if desired.