Lemon Pie - cooking recipe

Ingredients

1 baked pie shell
1 1/4 c. sugar
6 Tbsp. cornstarch
2 c. water
1/3 c. lemon juice
3 eggs, separated
3 Tbsp. butter
1 1/2 tsp. lemon extract
2 tsp. vinegar

Preparation

Mix sugar and cornstarch in top of double boiler.
Add water. Combine beaten egg yolks and lemon juice; beat.
Pour in double boiler.
Cook until thick, then add vinegar and extract.
Cool, then pour into pie shell.