Preheat your oven to 425°F (220°C).
In a large bowl, whisk together the pumpkin puree, heavy cream, and brown sugar.
Add the eggs, vanilla extract, cinnamon, nutmeg, ginger, and salt. Mix until smooth.
Roll out the pre-made pie crust and place it into a 9-inch pie pan.
Pour the pumpkin mixture into the crust, spreading it evenly.
Bake in the preheated oven for 15 minutes.
Reduce the temperature to 350°F (175°C) and continue baking for an additional 35 minutes.
Check for doneness; the filling should be set but slightly jiggly in the center.
Remove from the oven and let cool on a wire rack for at least 2 hours.
Serve chilled or at room temperature, topped with whipped cream if desired.