Add all mousse ingredients into a high-speed blender and blend until smooth and creamy (you may need to do this a few times depending on thickness of mousse). If needed, add a little bit more coconut milk until you get a smooth, thick texture.
Scoop mousse out into individual-sized mason jars or ramekins and sprinkle the top with sea salt. Place in the freezer for 2 hours to chill.
Whip chilled coconut cream (if you are using coconut milk scoop out the solid coconut and discard the liquid) with sea salt and sweetener in a high speed blender or beaters until firm. Place in fridge and top mousse when ready to serve.
