Roast sweet potatoes at 400°F for 45 minutes until tender.
Scoop flesh and mash until completely smooth.
Whisk potatoes, sugar, eggs, cream, butter, vanilla, and spices.
Bake pie crust at 350°F for 10 minutes.
Spread sweet potato filling into warm crust.
Bake 25 minutes until slightly set.
Combine pecans, brown sugar, syrup, butter, egg, vanilla, and optional bourbon.
Spoon pecan mixture over sweet potato layer.
Bake 25–30 minutes until bubbly and golden.
Cool 3+ hours to fully set.