Poke 4 or 5 holes in sweet potato, Place sweet potato in oven preheated to 400°, bake for 35-40 minutes until soft. Or you can microwave for 8-10 minutes. Set aside and allow to cool.
Pull skin from sweet potato and scoop inside into a large bowl.
In a blender, chopper, or food processor combine parsley and egg, run until parsley is well chopped. Add to sweet potato in bowl.