Poke sweet potato with fork and wrap with foil.
Bake in a preheated 350 F oven for an hour, or until it is soft. Check tenderness with fork. When the fork slides into the potato easily, it is ready.
Peel the cooked baked potatoes put in a large bowl. Using a masher, mash potato until very fine.
Add the rest of the ingredients and mix until ingredients are well incorporated.
Transfer mixture in a ready made thawed pie crust and bake for 50 minutes. Start checking when you can smell the pie, at about 40-45 minutes using the toothpick test.