In a bowl, whisk together the pumpkin, the egg, the cinnamon, the nutmeg, the ginger, the salt, and the brown sugar, and set aside.
In a large bowl with an electric mixer, cream the cream cheese and the granulated sugar, beat in the cream, the cornstarch, the vanilla, the bourbon liqueur, and the pumpkin mixture, and beat the filling until it is smooth.
Pour the filling into the chilled crust. Place the springform pan on a baking sheet and bake the cheesecake in the middle of a preheated 350°F. Oven for 50 to 55 minutes, or until the center is just set, and let it cool in the pan on a rack for 5 minutes before proceeding to the topping step.