Combine and mix well, egg, sugar, cream and vanilla for the custard.
Place all the shredded pumpkin in the tart equally flat, it might seems a lot, but no worries, it will cook down in volume.
Bake in pre heated oven at 350 F for 45 minutes.
Add the custard mix to the tart and continue to cook for another 30 minutes. Make sure the custard is set.
When pulling the tart out of the oven, sprinkle a little bit of granulated sugar on top. (that was my mom's touch LOL)
Wait for the tart to cool down in order to cut it and serve.