Gaucho describes the cowboys of northern Argentina and southern Brazil. These rustic cattle herders developed a simple yet powerful style of grilling over an open wood fire, a tradition still celebrated around Planet Barbecue today.Here are three indispensable gaucho favorites:Chicken roasted in a salt crust, from Uruguay's celebrity grill master, Francis Mallmann; the monster beef ribs that made the reputation of Brazil's famous grill house, Fogo de Chao; and a dessert from Brazil's cattle country, a pineapple you roast on the rotisserie.