Lemon Meringue Pie

I have a friend in town who loves Lemon Meringue pie and we don't have any local bakeries that make this pie, so every year, for her birthday I make one for her. I must admit, this is not an easy pie to make and it takes a lot of attention but it is all worth it.~BarbaraJo

LEMON MERINGUE PIE
1 9" pie crust, cooked and cooled
1 1/2 c. sugar
3 T. cornstarch
3 T. flour
dash of salt
1 1/2 c. hot water
3 slightly beaten egg yolks
(save the egg whites of the meringue)
2 T. butter
1/2 t. lemon zest
1/3 c. lemon juice

In a sauce pan, mix sugar, cornstarch, flour, and salt. Gradually add hot water stirring constantly. Cook mixture until it comes to a boil. Reduce heat and cook for 2 minutes. Temper egg yolks, add to mixture and return to a boil. Cook for 2 minutes. Add butter, zest and lemon juice, mix well. Fill pie shell with lemon mixture. Top with meringue, be sure to seal
all edges with meringue. Bake at 350 degrees for 12-15 minutes, until golden brown.

MERINGUE
Beat 3 egg whites
1/2 t. vanilla
1/4 t. cream of tarter
Begin to whip above ingredients, gradually add
6 T. sugar
Beat until stiff