I looked up some green tea ice cream recipes for you. I've had it at a Chinese restaurant before and it was yummy! But I've never tried making it on my own.
Homemade Ice Cream
Green Tea Ice Cream Recipe
2 egg yolks, 2 tablespoons dry green tea, 1 tablespoon sugar, 1/2 vanilla pod, 1 1/4 cups double (heavy) cream, 1/4 cup caster sugar, 1 1/4 cups milk, 2 tablespoons boiling water
Take the dry green tea and soak in boiling water with the tablespoon of sugar for 10-12 minutes. Into a saucepan put the vanilla pod and milk and gently bring to the boil then pour this over the tea. Leave to stand for 5 or 6 minutes. Beat the egg yolks with the 1/4 cup caster sugar in a separate bowl and then strain the milk mixture into it. Transfer to a saucepan and gently heat, stirring all the time, until the mixture is thick. Leave to cool. Whip the double (heavy) cream and fold into the cooled tea mixture. Transfer the complete mixture into an ice cream maker and follow the manufacturer's instructions.
Green Tea ice cream recipe
1/3 cup water
1/3 cup sugar
2 teaspoon green tea
1 cup heavy cream
1 cup light cream
Combine the water and sugar in a small saucepan over low heat, stirring, until the sugar melts, and simmer the syrup for 5 minutes. In a separate bowl, mix 1 tablespoon of the syrup with the powdered green tea, then add that mixture to the syrup in the saucepan, and stir until evenly mixed. Add the light cream and heavy cream , pour into an ice cream freezer, and freeze according to manufacturer's instructions.