Add a pinch of salt to the eggs and beat well then add 13 of the egg mixture to the pan lifting the sides with a spatula so that the liquid covers the vegetables
Add the remaining eggs Wait until the egg mixture has set that is until the bottom is slightly toasted and the surface is still moist not runny
Put the spatula under the omelette and detach it gently from the pan Add more butter or oil if necessary
Slip the omelette back into the pan this time undone side down