To make the filling, sprinkle the gelatin in a small bowl filled with 1 tbsp of water and set aside.
In a medium saucepan, heat the heavy whipping cream and macadamia milk over a medium-high heat.
While it’s heating, place the egg yolks into a bowl together with the sweetener, vanilla and salt. Using a hand mixer, mix until frothy and well combined.
Once the cream mixture starts simmering and foam starts to form, remove from the heat. Use a ladle to gradually add the hot mixture into the egg mixture. Keep whisking constantly or the mixture will turn into scrambled eggs.
When the eggs have been tempered, place the mixture into the saucepan.
Whisk continuously and cook over a medium heat until it starts to thicken, about 2 minutes. Cook for another 3 to 4 minutes.
Remove from the heat and add the bloomed gelatin. Then stir in the butter.
Pour the mixture into a container and let it cool to room temperature.
Cover with a lid and refrigerate for at least 3 hours or overnight. You can make this one week ahead of time.