First, in a small bowl, combine the egg yolks and almond milk.
Next, in a sauce pan, stir together the cornstarch and the coconut sugar. Pour in the egg and milk mixture. Blend together over medium heat (stir constantly) until the mixture thickens. Then remove from the heat.
Next, stir in the the chocolate, vanilla, salt, and butter until melted and incorporated well.
Finally, pour the chcolate mixture into the pie shell and refidge for a couple of hours before eating.