Preheat oven to 400 degrees F.
Mix egg, pumpkin, sweetened condensed milk, half and half and spices. Mix until well combined but do not over mix (no need for an electric mixer).
Pour or spoon into crusts. Place individual pies onto a baking sheet to make it easy to put them in and take them out of the oven.
Place into oven and immediately reduce temperature to 350 degrees F. Bake for approximately 30-35 minutes, or until centers are set and a knife inserted into the center of a pie comes out clean. Remove from oven and allow to cool completely. Store in fridge until ready to serve. Top each pie with a dollop whipped cream if desired.