Preheat the oven to 220 degrees C. Roll out the pastry and use to line a buttered pie tin. Top the pastry with a layer of baking paper and dried beans. Blind bake for 10 minutes, remove from oven, remove beans and paper and let cool. Turn oven to 180 degrees C.
Combine the pumpkin puree with all the other ingredients and mix until smooth. Pour this into the pie.
Bake about 50 minutes, until the filling is firm. Exact time will depend on the thickness of your pie. The centre should be a little soft, it will harden as it cools.