1 can sweetened condensed milk
4 egg yolks
1/2 c. key lime juice
4 egg whites
6 tbsp. sugar
1/2 tsp. cream of tartar
1 baked pie shell

Mix together condensed milk and 4 egg yolks and 1/2 cup key lime juice. Beat 1 egg white stiff. Fold into above mixture. Pour into baked pie shell. Beat 3 egg whites and gradually add sugar and cream of tartar. Spread over filling forming peaks. Bake at 350 degrees until egg whites are golden brown.