Slowly heat the milk in a non stick sauce pan or double boiler is even better until it gets hot,just about to the boiling point. combine the sugar,cornstarch and salt together with the egg yolks and one cup of the reserved milk,mix well.
Next add whisk half of the hot milk mixture into the egg mixture to temper it,then add that back in to the heated milk mixture and whisk it until the peanut butter has melted.
Remove from heat,transfer to another bowl and let it cool slightly. in the mean time make fresh whipped cream with the heavy cream and confectioners sugar. Pour the peanut butter mixture into the pie shells and top with whipped cream,chocolate chips or flaked chocolate,chopped nuts and caramel drizzle! Chill for at least one hour before serving,enjoy! :)