In a large bowl whisk together the eggs, cream and vanilla.
In a separate bowl, combine the pumpkin purée, sugars and spices.
Then add the egg mixture to the pumpkin mixture, and mix thoroughly (I use an electric mixer to do this).
Pour the pie filling into a 9-inch pie pan, then place into the preheated oven and bake for 1 hour. You will know the pie filling is set when you jiggle the dish, and the centre of the filling moves like gelatin. Not watery, but gelatin-y.
Let the pie cool on a wire rack completely before serving. It needs this time for the filling to set completely.