Combine all ingredients in a high-speed blender and blend until smooth.
Refrigerate until very cold (2+ hours).
Pour into ice cream machine and churn according to manufacturers instructions.
Notes
Feel free to omit the ginger if you only want a fresh peach taste. If you enjoy a little kick of ginger, add pickled ginger or grate 1 teaspoon fresh ginger. 1 Weight Watchers Smart Point per serving.