Filling: Mix filling ingredients, and cook until thick, then chill through (may be set in freezer to chill).
Topping: Mix well the cream cheese and powdered sugar. Whip one cup whipping cream and fold into cream cheese mixture.
Assembly: Spread half of the topping mixture in the bottom of a baked 8-inch pie shell, then pour filling on top and spread evenly. Place the remaining half of the topping over the filling and chill before serving.