Whisk together the coconut milk, five spice, vanilla and marmalade until smooth and homogeneous.
Divide the coconut milk equally between the popsicle molds. Place in the freezer for 10 minutes, then top with the blueberry puree. Freeze for 30 minutes, then insert the popsicle sticks and continue freezing for 4 hours, or until firm.
Run the popsicles under warm water (I like to get a deep cup and fill it with warm water), then pry them gently from the molds. Sprinkle generously with black sesame seeds and serve.