Step 1
Pour pecans into a blender; grind into a meal.
Step 2
Whisk pecan meal 1/3 cup brown sugar flour cinnamon and salt together in a bowl. Rub in butter with your fingers until mixture resembles a coarse meal and a few pea-sized pieces remain. Drizzle beaten egg over butter mixture; mix gently with a fork until dough comes together.
Step 3
Turn dough onto a lightly floured surface and knead until smooth. Form dough into a disk. Wrap in plastic wrap and chill until firm at least 2 hours.
Step 4
Preheat oven to 325 degrees F (165 degrees C).
Step 5
Roll out dough on a lightly floured surface into a 10-inch crust. Transfer to an 8-inch baking dish. Cover crust with a piece of parchment paper; fill with pie weights.
Step 6
Bake in the preheated oven until edges are golden brown 10 to 15 minutes. Transfer to a wire rack and let crust cool.
Step 7
Place a steamer insert into a saucepan and fill with water to just below the bottom of the steamer. Bring water to a boil. Add sweet potatoes cover and steam until tender 8 to 10 minutes. Strain into a bowl; mash until smooth.
Step 8
Combine 8 ounces plus 6 ounces cream cheese and 1 cup brown sugar in a bowl; beat with an electric mixer until smooth. Add eggs one at a time mixing well between each addition. Beat in mashed sweet potatoes and sour cream. Add cinnamon and ginger.
Step 9
Split vanilla bean lengthwise with the tip of a sharp knife. Holding the pod open scrape seeds from each half using the flat side of your knife. Beat seeds into the cream cheese mixture.
Step 9
Pour cream cheese mixture into the cooled crust.