In saucepan, over medium heat, melt chocolate with sweetened condensed milk & salt. Cook & stir until very thick & bubbly, 5-8 minutes. Add water & egg yolks. Cook & stir rapidly until mixture thickens & bubbles again. Remove from heat. Stir in vanilla.

Pour into large bowl. Chill thoroughly. Beat until smooth. Fold in 1 cup whipped cream. Pour into prepared pastry shell.

Chill for 3 hrs or until set. Top with additional whipped cream. Keep refrigerated.