In microwave safe container, sprinkle the gelatin over the cool water and set aside for a few minutes to bloom.
In a blender, pour egg whites, almond milk, sweetener, cocoa powder, collagen, sunflower lecithin, stevia powder, salt, and vanilla. Blend on high until mixture is smooth and lump-free.
Warm the bloomed gelatin in the microwave until it’s liquefied (usually 15-20 seconds) to activate the gelatin.
With the blender on a low-medium speed, slowly pour the activated gelatin into the chocolate mixture. Blend until fully incorporated.
Pour the chocolate filling into the prepared, cooled pie crust. Refrigerate for several hours, up to overnight, to fully set the filling.
Serve with a couple of low carb berries on top, or if you’d like to add some fat, a dollop of homemade whipped cream. Enjoy!