OK.. I just found this...
Soy milk can be used in place of dairy milk for any recipe. For cream based soups and desserts (especially flan, pudding, custard), you might want to try whole or possibly lowfat soy milk, as nonfat will not provide the desired consistency (it cannot bind as well as whole fat soy milk).
So I suppose in place of the 2 cups of heavy cream I would heat full fat soy milk until it thickened a bit and then just use regluar, low fat soy milk in place of the half and half.
or you could use this recipe...
Green Tea Sorbet
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Yields: 3 cups
Ingredients:
3 cup water
2 1/2 tablespoons fine-quality Green tea leaves
3/4 cup, plus 2 tablespoons sugar
In a small saucepan bring water to a boil. Add tea leaves and remove pan from heat. Cover pan and steep tea 5 minutes. Add sugar, stirring until dissolved, and strain tea through a fine sieve into a bowl. Chill tea, covered, until

and freeze in an ice-cream maker. Sorbet may be made 1 week ahead.
