Step by step

Grate the onion with a grater and then chop it some more with a knife, then add to mixture.

Tips
To enjoy something as truly unique and flavoursome as a wonderful steak tartare, you should match it with a bottle of Dolcetto wine.
Trivia
Although in this steak tartare is a specialty attributed to northern France, in fact it has deeper origins dating back to the period of the Tartar people in Asia.