1 c. sugar
2 eggs
1 tbsp. vinegar
2 tbsp. flour (or cornstarch)
1 c. water
Sm. lump butter
1/2 tsp. lemon extract

Combine sugar, eggs, vinegar, flour and water in double boiler and cook until thick and smooth, stirring occasionally. Just before removing from heat, stir in small lump of butter and some lemon extract. Pour into baked pie shell. May be topped with frosting or whipped cream.