2 eggs, separated
1 can sweetened condensed milk
1/2 c. lemon juice
1 tsp. grated lemon rind
1/4 tsp. cream of tartar
2 tbsp. sugar

Beat egg yolks; stir in milk, lemon juice and rind. Beat egg whites with cream of tartar. Gradually add sugar, beating until stiff. Gently fold into above mixture. Pour into crust. Chill 3 hours.