PREPARE THE CAKE PAN: Preheat the oven to 325 F . Butter the sides
and bottom of a 10-inch cake pan and line the bottom with a circle of
parchment paper.
MAKE THE CRUST: In a shallow pan, blend the
graham cracker crumbs and sugar evenly with a fork. Add the melted butter
and egg white and mix well. Press the graham mixture into the prepared
cake pan to make an even bottom crust. Bake the crust until it is lightly
toasted and set, about 8 minutes. Cool slightly.
MAKE THE
PUMPKIN FILLING: In a bowl, combine the cream cheese and brown sugar.
With a mixer on low speed, or with a wooden spoon by hand, blend the
ingredients until very smooth. Take care not to overbeat the mixture or
you will incorporate too much air into the cheesecake. Add the pumpkin
puree, ginger, cinnamon, mace and salt and mix gently for 3 to 4 minutes,
scraping down the sides and bottom of the bowl often, until the mixture is
evenly blended. Add the mascarpone and mix gently for 2 to 3 minutes,
scraping the bowl. Add the eggs and mix for 2 to 3 minutes, scraping the
bowl as necessary.