1. Thoroughly mix gelatin, 1/2 cup sugar and salt in a sauce pan.

2. Beat together egg yolks, lime juice and water. Stir into gelatin mixture.

3. Cook and stir over medium heat just until mixture comes to boiling.

4. Remove from heat, stir in grated lime peel.

5. Add food coloring (enough to tint to a pale green color).

6. Chill, stirring occasionally until mixture mounds slightly.

7. Beat sugar into egg whites beating to stiff peaks.

8. Fold gelatin mixture into egg whites, then fold in whipped cream.

9. Pile into cooled baked pastry shell.

10. Chill until firm.