Here's a dish that takes us down to South America and the Argentinean pampas, home of the gauchos, the continent's cowboys. Chimichurri is a traditional condiment that's similar to a pesto sauce but made with parsley rather than basil. It's the typical accompaniment for the classic Argentinean dish, churrasco, which is usually made with skirt steak. In this recipe, Chef Douglas Rodriguez (Patria, New York, New York) uses filet mignon, which is the preferred cut of his maître d' , Ariel Lacayo, whose family owns the famous Los Ranchos steak house in Managua, Nicaragua.