This fusion recipe starts with a typical colonial pumpkin custard (seasoned with cinnamon and allspice), mixes in some soulful sweet potatoes, and then gives it a Caribbean stir of coconut milk and a vanilla-scented candied coconut topping.
Preheat oven to 350 degrees F. Combine sweet potatoes, reserved syrup, coconut milk, pumpkin, brown sugar, melted butter, 2 eggs, cinnamon, ginger and allspice in the work bowl of a food processor. Process in pulses until completely smooth, about 1 minute. Line a pie plate with prepared crust and crimp the edges. Note that you will have to roll the crust to be about 1 inch bigger all around if using a 9 1/2-inch pie plate.
Fill crust with the filling and even the surface. Bake for 45 minutes. Meanwhile, mix the remaining egg, coconut, corn syrup and vanilla in a mixing bowl until well combined. Spread over the surface of the baked filling. Return to the oven and bake until golden brown, about 40 minutes, until knife inserted near center comes out clean. Cool for at least 1 hour before serving.