At the beginning of bread preparation, preheat the oven to 165 °C (329 °F).
Separate the eggs from the whites.
Separate the eggs from the yolks.
Sift albumin into the egg whites. Beat until stiff peaks form. The peaks will not come off when you turn the mixing bowl upside down. It usually takes four minutes for the egg whites to reach the desired peaks.
Add salt, erythritol powder, and instant gelatin to the egg whites. Beat for another minute.
Add the egg yolks while beating at medium speed.
Grease the baking pan with oil. Pour in the batter. Place the pan in the oven for half an hour. Then turn off the oven and leave the bread in the oven for another half hour.
Remove the bread from the oven and let it cool completely in the pan. Cut into slices only after it has cooled.
Notes
Make sure the mixing bowl and whisk are completely clean and dry before whipping the egg whites, any fat or moisture will prevent stiff peaks from forming.
Do not overbeat the meringue after adding the yolks, mix just until combined so you do not deflate the batter and lose volume.
Bake the bread on the middle rack and avoid opening the oven door during the first 30 minutes to keep the temperature stable.
Leaving the bread in the turned off oven for another 30 minutes helps it set slowly and reduces the risk of collapsing when you take it out.
Always let the loaf cool completely in the pan before slicing, otherwise the interior can feel wet and the slices may break.