The sweetener in this recipe is any "on plan" sweetener that measures cup for cup like sugar. (I use the ratio of 1 cup erythritol to 1/2 teaspoon THM stevia powder.)
Serving idea: Serve with sweetened whipped cream.
Prep Note: If your pie pan is only 9 inches, you have leftover filling. The rest can be put into ramekins and eaten as pumpkin custard.