Grate and thoroughly mash the ginger root in a bowl. Place in a large pot and add all ingredients except the yeast. Stir until sugar and cream of tartar is dissolved. Allow mixture to cool, then add yeast which has been started ( dissolved) in a little lukewarm water. Cover tightly for 6 hours, then filter first through a tea strainer or similar, then through cloth. ‘
Bottle and cap tightly, sealed. Place in dark, cool (60 degree) place for two weeks. Chill fully before opening to drink.