2 teaspoons of citric acid
900 grams of sugar
a large bunch of mint
750 ml boiling water
Grate all the skins off the lemons and place them in a bowl, then squeeze the juice from the lemons over the skins. Add all the other ingredients, pour the boiling water into the bowl and stir until the sugar has disolved, crushing the mint at the same time.
Let this mixture cool down and then strain and bottle when cool. It can be stored in the fridge.
Because this is a cordial, you only need to pour a tiny amount in a glass and fill the rest of the glass with filtered water. This is such a refreshing drink, enjoy!