You may serve it with capers, onions and seasonings. Some people also add a raw egg yolk.
Anyhow, the word 'tatar' in English is...
My personal experience:
I remember I used to eat steak tartare when I was a child. My father often used to prepare it. And... to be honest I quite liked it. It's a great dish if you know how to season it well. However, I am afraid I wouldn't force myself to have 'the horse meat' based version... Anyway, I don't eat tartare these days. I guess I have turned to having other things than meat... and raw meat in particular :)
Now... what are your own experiences? Have you ever eaten raw cow or horse? :) How do you like this tartare best?
My question to you:
Have you ever tried steak tartare? What do you think of eating raw cows and horses?