Ice-cream Preparation

Mix the green tea powder with the hot water together in a bowl and set aside. Lightly whisk the eggs yolks in a pan and then add the sugar and mix well. Gradually add the milk to the egg and sugar mixture, mixing well. Place the pan over a low heat and heat the mixture, stirring constantly. When the mixture thickens, remove the pan from the heat. Cool by placing the bottom of the pan in a bowl of ice cold water. 

Leaving the bottom of the pan in the ice water, add the green tea liquid to the egg mixture and stir well. Whip the cream and stir into the mixture, folding in gently. 

Pour the whole mixture into an ice cream maker and freeze, following the instructions of the ice cream maker. Alternatively, pour the mixture into a container and freeze in a freezer which has been turned to its coldest setting, removing from the freezer once or twice to whisk up the ice cream and prevent large ice crystals from forming.