Over medium heat on the stovetop, whisk together the sugar substitute, cornstarch, and salt.
Slowly whisk in the milk. Turn the heat to medium-high.
In a separate bowl, whisk eggs.
Slowly begin to add the milk mixture into the egg mixture being careful not to add all at once.
Place saucepan back onto medium-high heat and whisk constantly until the mixture begins to thicken.
Add vanilla and stir to mix.
Begin to layer pudding mixture, bananas, and vanilla wafers.
Refrigerate for 2 – 3 hours.
Add a dollop of whipped topping (optional).
Enjoy!