Shredded Beef Salad (Salpicon)

What do Argentine cooks do after they've invited friends and family over for a large asado, overestimated the number of guests, and now have pounds of leftover meat? Cecilia Sere, of the estancia La Leocadia, turns to this dish—as do cooks across the country—as a solution. Though we call for flank steak here, this savory salad can be made with any type of meat, including chicken or fish.