FILLING:

1/3 c. key lime juice (or use 1/2 lemon and 1/2 persian lime)
4 egg yolks
1 can condensed milk

MERINGUE:

1/4 tsp. cream of tartar
1/2 c. sugar
3/4 tsp. vanilla
4 egg whites

Graham cracker crust, baked

Blend filling ingredients together. DO NOT USE ALUMINUM PAN OR UTENSILS. Pour into crust. Beat egg whites until stiff. Add cream of tartar, sugar and vanilla. Pile on pie sealing edges. Bake at 400 degrees 10 minutes or until meringue starts to brown.