2 inches ginger, grated
3 tablespoons lemon juice
1 cup sugar
4 lemon slices, to decorate
Combine the ginger and sugar with two cups of water in a non-stick pan.
Bring the mixture to a boil, stirring continuously until the sugar dissolves. Simmer for three minutes.
Strain the syrup through a piece of muslin and set aside to cool.
Combine the syrup with two and a half cups of water. Add lemon juice and stir well.
Pour into individual tall glasses. Add the ice cubes and decorate each glass with a lemon slice. Serve immediately.