Creating this Banana Cream Dessert can be straightforward if you follow these simple steps:

1. Prepare the Crust: If using a homemade pie crust, bake it according to the recipe and let it cool completely.
2. Slice the Bananas: Cut the ripe bananas into thin slices and set aside.
3. Make the Custard: In a saucepan, whisk together the milk, granulated sugar, cornstarch, and salt. Cook over medium heat, stirring constantly until thickened.
4. Add Egg Yolks: Temper the egg yolks by slowly adding a bit of the hot custard to them. Then return the mixture to the saucepan. Cook for about 2 additional minutes, stirring constantly.
5. Finish the Custard: Remove the saucepan from the heat and stir in the butter and vanilla extract until smooth. Allow the custard to cool slightly.
6. Assemble the Dessert: Layer half of the sliced bananas at the bottom of the cooled pie crust. Pour half of the custard over the bananas. Repeat the layers, finishing with the custard on top.
7. Chill the Dessert: Cover the dessert with plastic wrap and refrigerate for at least 2 hours until set.
8. Whip the Cream: In a large mixing bowl, beat the heavy cream and powdered sugar until soft peaks form.
9. Top with Whipped Cream: Spread or pipe the whipped cream over the chilled dessert just before serving.
10. Garnish: Optionally, add extra banana slices or a sprinkle of graham cracker crumbs on top for decoration.

These steps will guide you in successfully preparing this incredible dessert.