Preheat your oven to 425°F. Place the oven rack in the lower third for a nicely set bottom crust.
In a large bowl whisk together the pumpkin puree, coconut milk, eggnog, eggs, vanilla, and brown sugar until smooth.
Add the cinnamon, nutmeg, ginger, cloves, and sea salt. Whisk again until everything is fully combined.
Pour the filling into the unbaked pie shell. Lightly tap the pie dish on the counter to release air bubbles.
Bake at 425°F for 15 minutes.
Without opening the oven door, reduce the heat to 350°F and continue baking for 40 to 50 minutes until the centre is mostly set but still has a gentle wobble.
Let the pie cool completely on a wire rack. This helps it finish setting and gives you clean slices.
Serve at room temperature or chilled, topped with whipped cream and a sprinkle of nutmeg if you like.