Steak tartare, he's boeuf a la tartare is raw meat, finely chopped or minced, with the addition of raw egg yolk, seasoned with sauces and spices. In fact, it is raw meat, softened by heating at a low temperature.
This is a very exotic dish invented the Mongols, who just put a piece of raw meat under the saddle during his movement. To engage in military campaigns cooking was problematic, as was required to build fires, which could see the enemy. Therefore, the Mongols simply pulled out from under the saddles softening of their weight and eating a piece of it with seasonings. Not the most appetizing way of cooking.