01 -
Set your oven to 300°F (150°C) to preheat. Beat egg whites together with vinegar on high speed using a mixer (stand or handheld) until you get stiff peaks. This will take about 10–15 minutes. Put aside when ready.
02 -
In a big bowl, mix together the egg yolks, cottage cheese, baking powder, salt, whey protein, egg white protein, and allulose (if using). Stir until smooth or throw everything into a blender to get it creamy.
03 -
Take small portions of the yolk mixture and gently blend them into the whipped egg whites, being careful to keep the mix light and airy.
04 -
Pour the batter into a greased loaf pan lined with parchment paper (5×9-inch size). Put it in the middle rack of your oven for about 50 minutes, or until a toothpick pushed into the center comes out dry and the surface turns golden.
05 -
Once done, leave the bread inside the oven with the heat off for another 10 minutes. Then take it out, give it a bit of time to cool, and it's ready to go.