what is chimichurri
10 most extreme places on Earth. Chimichurri is an herb condiment sauce that is considered a culinary specialty of Argentina. Typically served with grilled or roasted beef, it is made from parsley, oregano, garlic, onion, salt, and pepper in a liquid base of olive oil and vinegar.0 most extreme places on Earth. Chimichurri is an herb condiment sauce that is considered a culinary specialty of Argentina. Typically served with grilled or roasted beef, it is made from parsley, oregano, garlic, onion, salt, and pepper in a liquid base of olive oil and vinegar.