Vinegar Pie

1 cup sugar
2 tbsp unbleached flour
1 cup cold water
5 tbsp vinegar
2 1/2 tbsp butter
4 large eggs, beaten

Combine sugar and flour. Add the rest of the ingredients and place in a saucepan. Cook until thick and pour into prepared pie crust.

Bake in a 375 degrees F. oven until crust is brown.

Source: Farm Journal's Pie Cookbook