1. In a large saucepan, combine the marshmallows, milk and chocolate. Cook and stir over medium-low heat until smooth. Cool completely.
2. Fold 3/4 cup whipped topping into chocolate mixture. Pour into prepared crust. Cover and refrigerate for at least 30 minutes.
3. Top with pie filling and remaining whipped topping. Cover and refrigerate for 8 hours or overnight. Yield: 8 servings.