1 (9 inch) pie shell, baked
1 c. granulated sugar
3/4 c. butter, softened
1 1/2 tsp. vanilla
1/4 tsp. cream of tartar
3 (1 oz.) sqs. unsweetened chocolate, melted & cooked
3 eggs
1 c. chilled whipping cream
2 tbsp. powdered sugar

Bake pie shell; cool. Beat granulated sugar and butter in 1 1/2 quart bowl until light and fluffy. Stir in vanilla, cream of tartar, and chocolate. Beat in eggs until light and fluffy, about 3 minutes. Pour into pie shell. Refrigerate until set, (3 to 4 hours). Beat whipping cream and powdered sugar in chilled 1 1/2 quart bowl until stiff. Top pie with whipped cream and chopped nuts or chocolate curls. Refrigerate.