Crust

1. Put the flour, pumpkin seeds, and salt into food processor with fitted metal blade. Process until pumpkin seeds are finely ground.
2. Add the butter and pulse until mixture resembles coarse meal.
3. Add maple syrup, vinegar & cold water and pulse until mixture clumps.
4. Roll into ball and flatten on parchment paper pressing into a large flat circle and chill until firm, about 30 minutes.
5. Preheat oven to 400°.
6. On lightly floured board, roll dough into a 12" circle and transfer to 10" pie plate pressing into bottom and up sides. Finish edges. Prick with fork in several places. Line with parchment paper or foil and weight with dried beans or rice. Place in oven for about 10 - 12 minutes. Remove from oven and let cool. Lift parchment or foil and weights and remove them from baked shell. Set aside.
7. Reduce oven temperature to 350°.

Filling

1. In mixing bowl, place egg, pumpkin, milk, maple syrup or agave, cinnamon, nutmeg, allspice, salt, and vanilla.
2. Whisk until smooth.
3. Pour into baked pie shell.
4. Bake until filling doesn't jiggle. About 35 - 45 minutes. Set pie on rack.
5. Serve room temperature or chilled with whipped cream and whole pumpkin seeds if desired.