Wash your watermelon and cut in to cubes,put in to a blender and blend until you get a smooth paste sieve to extract the juice in a bowl and set aside

Put 1liter of water in a pot add 1cup sugar and bring to boil your syrup is done allow it to cool

Squeeze your lemons and sieve to extract the juice

Add the lemon juice into the watermelon add foster clark and mix well

Add your cooled syrup to the juice your watermelon juice is ready refrigerate and serve chilled