Combine all the ingredients in a blender and blend until smooth and creamy. Transfer to a glass container that can hold 6 cups of liquid and place in the freezer. Stir the mixture every hour until it has frozen. (Alternatively, freeze the mixture in an ice-cream machine according to the instructions.)
Remove from the freezer half an hour before serving to soften slightly.
If you have a very powerful food processor or blender you can turn frozen fruit such as mangoes, bananas, pineapple, watermelon and berries of any variety into a sorbet in a few minutes. Simply add a few cups of frozen fruit and a little coconut milk to the food processor and blend on high until the mixture turns into a soft sorbet-like mixture. Serve immediately.
Makes 8 servings