Here is an alternative to the pumpkin pie for your Thanksgiving dinner. This easy pumpkin mousse is cool, creamy, and ready in minutes. Cream cheese, pudding mix, whipped topping, and canned pumpkin are layered with gingersnap crumbles for a fast fall dessert. A pumpkin mousse parfait, warmly spiced and studded with crunchy gingersnap bits, comes…