Preheat oven to 375 °F. In a medium saucepan combine all ingredients. Cook over medium heat until mixture begins to thicken, stirring constantly. Pour into pie crust. Bake 30 minutes until firm.
Corn Substitutions: Corn is a common ingredient in products. Starch, modified food starch, dextrin and maltodextrin can be from corn. Consult with your physician to find out which corn derivatives you need to avoid. Many corn-free options are available in the US. Find out more about corn substitutions.