Add all of the ingredients except for the ones listed under "Chocolate Topping" into a high-speed blender, and blend until smooth.
Pour the filling into the prepared pan and freeze for 5 hours. No need to cover.
When the filling is solid, prepare the chocolate topping. Combine chocolate chips, coconut cream (the thicker part), and sea salt into a medium pot and melt over low, stirring constantly.
Lift the frozen filling out of the pan and flip it over onto a plate that will fit in the freezer. Pour the chocolate topping over top and onto the sides. If it is too thick, you can add a bit of the coconut water. Add cacao nibs on for garnish if you wish. Put it into the freezer for 10 minutes. Slice and garnish with mint. Keep frozen.