A trio of regional dishes highlights the traditional Christmas meal here. Some Argentineans opt for three-inch squares of steak, spiced heavily and filled with more meat, hard-boiled eggs and onions or go for sweet and sour pork. But if that isn’t your style, you can choose roasted peacock instead. Hey, even use the feathers as a garnish. Due to the hot climate, cold salads, such as a Waldorf, have proven refreshingly popular.