I tried this recipe and it is not at all easy to incorporate 1/2 the egg whites in the food processor. When attempting to pulse just 2-3 times, only part of the egg whites incorporated, leaving 1/2 the whipped egg whites still sitting at the top of the mixture. I then had to use a spatula to force it down and pulsed 3 more times and ended up with a heavy batter because the egg whites completely fell. Then trying to fold the mixture into the rest of the egg whites was like trying to fold in cookie dough. The result was a loaf of baked eggs whites that had clumps of batter in the middle.
For example, although white potatoes were recorded as being available during the Paleolithic era, they are usually avoided on the Paleo diet because of their high glycemic index. Processed foods are also technically off limits due to an emphasis on fresh foods, but some Paleo diets allow frozen fruits and vegetables because the freezing process preserves most nutrients. https://www.youtube.com/watch?v=J0GYdEX6lqQ