Mix 1 envelope gelatin, ¼ c. sugar, 1/8 tea salt in top of double boiler.  Beat three egg yolks, and 1 ¾ c. milk.  Add to the gelatin mixture.  Cook over boiling water stirring constantly until gelatin is dissolved--8 minutes or less.  Do not over cook.  Remove.  Add 1 tea. vanilla.  Chill until mixture mounds when dropped from a spoon.  Stir in ¾ c. grated coconut.  Beat egg whites until stiff and beat in ¼ c. sugar.  Fold into gelatin mixture.  Turn into a 9” baked pie shell.  Top with whipped cream and ¼ c. toasted coconut.