Make-it-Visible Vinegar Pie

Make-it-Visible Vinegar Pie

9" pie crust

1/4 cup sifted flour

1 cup white sugar

1 cup  water

3 egg yolks

1/8 tsp salt

1 tbsp unsalted butter

1 tsp lemon extract

3 tbsp white Grunde Vinegar

3 egg whites

6 tbsp white sugar