Vinegar Pie - cooking recipe

Ingredients

1 egg yolk
1 rounded Tbsp. flour
1 c. sugar
1 tsp. lemon flavoring
1 Tbsp. strong vinegar
1 c. boiling water
1 rounded Tbsp. butter
1 baked pie crust
1 egg white
1 Tbsp. sugar
1/2 tsp. lemon extract

Preparation

Beat egg yolk, flour and sugar together well.
Add vinegar, water and butter.
Stir over medium heat until thick.
Flavor with lemon flavoring and pour into a baked pie crust.