In a bowl, combine eggs, yolk, heavy whipping cream, parsley, salt, and pepper; beat until foamy.
Give the egg mixture fifteen minutes to sit.
Add one tablespoon of cold, cubed butter to the egg mixture. Put aside.
In a 7 or 8-inch nonstick skillet, add 1/2 tablespoon of butter and place over low heat.
Pour the egg mixture into the skillet after the butter has completely covered it.
Continue stirring the egg mixture with a spatula, scraping it off the sides and bottom as you go. The secret is to be patient!
Spread the eggs over the whole surface of the skillet and turn off the heat when they are set enough to stay in place when scraped through with a spatula.
Put a cover on it and give it a minute or two to sit.
Using the spatula, slowly wrap the eggs into an omelette, starting at one end.
After rolling into an omelette, transfer it to a platter and savor it!