1 (3 oz.) pkg. lime Jello
1 c. boiling water
1 to 2 tsp. grated lime rind
1/2 c. lime juice
1 egg yolk, well beaten
1 1/3 c. (14 oz. can) sweetened condensed milk
1 tsp. aromatic bitters
1 egg white
Few drops green food coloring (optional)
1 baked 9 inch pie shell, cooked

Dissolve gelatin in boiling water. Add lime rind and juice. Pour slowly into beaten egg yolk, stirring constantly. Add condensed milk and bitters. Chill until slightly thickened. Beat egg white until stiff peaks will form. Fold into gelatin mixture. Add food coloring. Pour into pie shell. Chill until firm, about 3 hours. Garnish with lime slices or prepared Dream Whip topping, if desired.