1 (8 or 9 inch) baked pastry shell
1 (14 oz.) can sweetened condensed milk (NOT evaporated milk)
1/2 c. lemon juice from concentrate
Few drops of yellow food coloring, optional
1/2 tsp. cream of tartar
3 eggs, separated
1/3 c. sugar

Preheat oven to 350 degrees. In mixing bowl, beat egg yolks; add sweetened condensed milk. Lemon juice and coloring. Pour into crust. In mixer bowl, beat egg whites with cream of tartar to soft peaks. Gradually add sugar; beat until stiff. Spread on pie; seal to edge. Bake 12 to 15 minutes. Cool. Chill.