Add 1/2 cup peanut butter to the tofu, and process or blend until smooth.
Melt chocolate chips in the microwave for 1 minute, and then add it to the tofu and peanut butter mixture. Process or blend again until creamy.
Test the pie filling to make sure it's sweet enough. If you're using unsweetened peanut butter and/or unsweetened chocolate, it might not be sweet enough. If that's the case, add some maple syrup and/or brown sugar to get your desired sweetness.
Pour the filling mixture into the ready pie crust. Refrigerate for at least 1 hour so that the pie sets. If you leave it overnight it's even better. You can top the pie with fresh berries, chocolate chips, or vegan whipped cream.