Yields about 2 quarts
In a large saucepan, bring 2 cups of water to a boil with the sugar. Once completely dissolved, remove from heat and allow to cool.
Juice the lemons; this will yield about 1 cup of freshly squeezed juice. In a blender, combine lemon juice and blackberries and blend until pureed. Strain mixture and discard seeds.
Since spring has just arrived in South Africa, I think this will be my seasonal drink.
Image and recipe from The Pastry Affair