3 eggs, separated
1/2 c. lemon juice
1 graham cracker crust
1/3 c. sugar
1 (14 oz.) can sweetened condensed milk
1 tsp. grated lemon rind
1/4 tsp. cream of tartar

Preheat oven to 350 degrees. Beat egg yolks; stir in milk, lemon and rind. Pour into crust. Beat egg whites with cream of tartar until foamy; gradually add sugar. Beat until stiff but not dry. Spread on top of pie carefully sealing the edges of the crust with the meringue. Bake 15 minutes. Cool.