Preheat oven to 350F. Grease 2 Baking Pans with Tallow, Lard or Butter. Cut parchment to line the bottom of the baking pans. Set aside.
Whip Egg Whites with Cream of Tartar until VERY VERY stiff peaks. Set aside.
In a separate bowl, beat Yolks at high speed until thicker and lighter in colour. Add in Swerve, Salt and half of Vanilla Extract.
Slowly beat Protein Powder into the Yolks. It will thicken up, but continue beating on low for 1 minute or until smooth and gluey.
Scoop 2 large dollops of Egg Whites and beat into Yolk mixture, on low, until a smooth, pudding, consistency.
Using a spatula, slowly and gently, fold Yolk Mixture (¼ at a time) into Egg Whites until incorporated. Being careful not to disrupt the fluff!
Pour complete mixture into greased and lined Baking Pans, ensuring there are no gaps.
Bake for 25-35 minutes or until golden brown and firm to the touch.
Allow to cool 5 minutes before removing to a cooling rack.