Preheat your oven to a hot 450°F (232°C). Line a baking sheet with parchment paper for easy cleanup.
Gently separate the egg whites from the yolks. Put the whites into a large, clean bowl, and carefully place each yolk into its own small pinch bowl (this helps keep them intact!).
Using an electric hand mixer, whip the egg whites on high speed until they transform into beautiful, stiff peaks. This means they'll hold their shape even when you lift the beaters!
Gently fold in the salt, pepper, and any of your chosen add-ins (if using) into the whipped egg whites. Be gentle to keep them airy and fluffy!
Spoon the fluffy egg whites onto the prepared baking sheet, forming 4 distinct mounds. Use the back of your spoon to create a small "nest" or well in the center of each cloud, just right for a yolk.
Pop the egg white clouds into the preheated oven and bake for just 3 minutes.
Carefully slide one egg yolk into the center well of each baked egg white cloud.
Return the clouds to the oven and bake for another 2-3 minutes, or a little longer if you prefer your yolks more firm. Serve immediately and enjoy your light, healthy breakfast!