In a small mixing bowl combine cream cheese, 1/4 cup sugar, and vanilla extract. Beat well, then add 1 egg and mix until thoroughly combined. Spread onto the bottom of pie shell and set aside.
In a medium bowl combine pumpkin, evaporated milk, 1/2 cup sugar, 2 eggs, cinnamon, ginger, nutmeg, and salt. Mix well, then pour the mixture over the cream cheese layer.
Bake in preheated oven for 1 hour or until set in center. Cool, then brush top with maple syrup.