4 egg yolks
1 can sweetened condensed milk
1/2 tsp. cream of tartar
6 egg whites
1 cup lime juice
3/4 cup sugar
1 baked pie shell

Beat egg yolks until lemon colored, blend in sweetened condensed milk slowly. Add lime juice and mix well. Add cream of tartar to egg whites and beat until foamy, continue beating while adding sugar, 1 tablespoon at a time until egg whites peak. Fold 6 tablespoons of the meringue into the filling mixture. Pour into pie shell. Top with meringue and bake in a slow oven, 330°F, until golden brown.