Beat the egg yolks and sugar together until pale. Warm the milk and stir into the egg mixture. Add the ginger and stir over a low heat until it coats the back of a spoon. DO NOT ALLOW TO BOIL. Pour into a bowl and cool, then freeze until it's mushy but not solid. Beat well and then fold in the whipped cream. Again freeze until mushy. Beat well and then fold in broken up meringues and freeze until firm, then cover and freeze for at least six hours before using.
Go to What to Buy for details about organic dairy products.