In a saucepan, mix together Swerve Sugar Substitute, cornstarch, and salt.
Add milk and egg yolks, and whisk everything together.
Heat the mixture on medium heat, stirring constantly until it thickens and starts to bubble.
When the mixture appears to be as thick as pudding, remove the saucepan from the heat and add chocolate, vanilla, and butter.
Stir everything together until well combined.
Pour the pudding mixture into the pie crust, making sure to fill it evenly. If there is extra pudding, spoon it into small dishes.
Place the pie in the fridge to chill for at least 4 hours, leaving it uncovered.
After 4 hours, remove the pie from the fridge and cut it into 8 slices.
To make it look pretty, dust MINIMALLY with some shaved bittersweet chocolate. Serve each slice up and enjoy! Each slice is now 11 WW Points. Bear in mind that if you are calculating WW Points, using the Nutrition Information below, you will get a higher WW Point reading. That is because the Nutritional Info below, doesn't take into consideration WW 0 Point Foods. So, use the 11 WW Points as the correct calculation.