This thick herb sauce is as common in Argentina as ketchup is in the United States. Chimichurri is a melange of olive oil, vinegar and finely chopped parsley, oregano, onion and garlic, all seasoned with salt, cayenne and black pepper. It's a must with grilled meat.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.