In Chile, the most traditional empanada filling is called "pino".
Pino is a seasoned mixture of ground beef, onions, raisins, black olives, and hard boiled eggs.
Empanada dough (see recipe link below)
3 large onions, chopped
1 pound ground beef
2 teaspoons cumin
1 teaspoon chile powder
1 tablespoon paprika
1 beef bouillon cube, dissolved in 1/4 cup hot water
2 tablespoons flour
1/2 cup raisins
1/2 cup chopped olives
2 hard boiled eggs, sliced
1 egg yolk
2 tablespoons milk
1.Prepare empanada dough and chill.
2.Cook the onions and garlic in the vegetable oil and butter until softened. Add the ground beef, cumin, chile powder, paprika, beef bouillon, and salt and pepper to taste.
3.Cook the beef, stirring and crumbling the meat, until browned. Add the flour and continue to cook for 5 or 10 minutes more.
4.Remove the meat mixture and let cool. The beef mixture will keep up to 2 days in the refrigerator.
5.Shape the empanadas: Separate the dough into golf ball size pieces, and roll into smooth balls. Let rest for 5 minutes. On a floured surface, roll each ball of dough into a 6 inch diameter circle, about 1/4 inch thick. Add 1 tablespoon of the beef filling, a few raisins and some chopped olives, and a slice of hard boiled egg to the middle of the circle.
6.Brush the edges with water and fold the pastry in half over the filling, to make a semi-circle.
7.Seal the edges by pressing down with your fingers. Brush the sealed edge lightly with water, then turn the edge toward the middle and press with your fingers to seal.
8.Mix the egg yolk with 2 tablespoons milk, and brush the empanadas with the mixture.
9.Bake at 350 for 25-30 minutes, or until golden brown.
This recipe from; http://southamericanfood.about.com/od/snacksstreetfood/r/empanadaschile.htm