1 env. unflavored Knox gelatin
1/2 c. sugar
1/4 tsp. salt
4 egg yolks
Juice of 4 limes
1/4 c. cold water
1 tsp. grated lime peel
2 drops green food color
4 egg whites
1/2 c. sugar
1 c. heavy cream, whipped
9" pie shell, pre-cooked

Mix the gelatin, sugar and salt in a heavy saucepan. Beat the egg yolks, lime juice and water together. Stir into the gelatin mixture. Cook over medium heat, stirring constantly until barely boiled. Remove the saucepan from the heat. Stir in the lime peels and coloring. Chill until the mixture thickens, but not yet set.

Beat the egg whites with remaining 1/2 cup sugar until it forms stiff peaks. Fold into the lime mixture. Fold in the whipped cream as well. Smooth the filling into the pre-cooked pie shell and refrigerate overnight. Garnish with rosettes of whip cream just before serving.