Pour a little oil on a frying pan and fry the onion till transparent .

Add the beef and fry for more ten min and add the stock , salt and pepper.

Cook for more 15 min .

Separate the egg yolk from the white yolks in two different bowls and beat , add salt and pepper to the mixtures.

Pour the white yolks on the beef and then the egg yolks.

Cover the pan and cook for 20 min or till the omlet rises.

Cut and serve.

Bonapetite!