Fold in the erythritol and pumpkin pie spice and finish beating until you get stiff peaks.
Place dollops of whipped egg on a parchment lined cookie sheet. Mine were roughly the size of a golf ball, but I wish I had made them a tiny bit more "bite sized". So use your judgement on the size.
Bake for 2 1/2 to 3 hours with the oven door partially open. This can be achieved by placing a wooden spoon between the door and the oven.