Here is the recipe and let me tell you this stuff rocks on a hot day it is a serious thirst quencher
4.5 litres water
30g root ginger, crushed
500 ml white sugar
15 ml active dry yeast
Boil the water, then add the ginger and sugar. Remove from the stove and cool till lukewarm. Add the yeast and leave, covered, for 1 to 2 days. Strain the beer and bottle in sterilized bottles and seal. Refrigerate and serve chilled, will keep in the fridge for a week or two.