First, prepare the pumpkins. Using a sharp knife, make a flat cut all the way through the small pumpkins, cutting the top off.
Using a spoon, scoop out the seeds and pulp to hold them out. Separate the seeds from the pulp. You can make crispy pumpkin seeds with those.
To a high speed blender, add the pumpkin pulp, coconut milk, maple syrup, pumpkin pie spices and soaked cashews. Combine until completely smooth.
Pour the custard into the four empty pumpkins, and place in the fridge to cool and set. Just before serving, add the pumpkins to a baking sheet, and sprinkle with 1/2 tablespoon of sugar each. Place the ramekins on the top shelf of your oven and broil for 1 to 2 minutes, until the sugar is brown, caramelized and hard on top. Enjoy immediately.