Melt choc. chips over hot water. Let cool about 10 mins. (any longer and they will stiffen) Whip cream cheese and salt until light and fluffy. Gradually add half cup brown sugar; cream this thoroughly Blend in egg yolk; one at a time,beating well after each addition. Add vanilla and choc. to mixture and beat thoroughly. Beat egg whites into soft peaks. Gradually add remaining sugar and beat until stiff and glossy. Fold Choc mixture into egg whites. Fold in whipped cream. Spoon into crust (follows) and chill overnight. Chocolate Crumb Crust: Combine crumbs and sugar, add choc. and butter,blending thoroughly. Pat mixture to the bottom and sides of 23 cm pie plate. Chill before adding filling.I also have a great recipe for a Chocolate Cream Cheese CAKE. If you want it, let me know.. Enjoy Bob in La Canada/Flintridge, Ca.