Years ago I taught craft classes with the city parks and rec in a small town in California. We would end the classes with a pot luck, one of my regular students gave me this recipe. I lost contact with them many years ago, but I have never lost the recipe.
Prepare your favorite pie crust or use frozen pie crust. Bake sweet potatoes till done than scoop potato out and mash in mixing bowl. You can also boil them, I find they are moister if you bake them in the skin.
Add cream, eggs, sugar, spices and vanilla. Pour mixture into prepared pie shell and bake in preheated 375 oven until set, when knife inserted comes out clean. Cool and serve with fresh beat whipping cream. Store cooled pie in fridge.
Just a side note, I mix both half and half and heavy cream together when making this pie. But either way you ant to make it, will work just fine.