No, I'm not Chilean, but I did split my time about 50-50 between Chicago and Santiago for about ten years, as a partner in a civil engineering consulting business, and kept an apartment there until about two years ago (til I met Sweet Baboo and decided to stay put in Chicago and get married). Technically I still have permanent residency in Chile.
The most common kind of empanada served in Chile is an empanada de pino, aka empanada de horno (oven), which is oven baked, half-moon shaped, and about 6 inches long and 4 inches wide. It contains ground beef and onions in sauce, a wedge of a hard-boiled egg, white raisins, and a big black olive (not pitted, so don't bite down hard til you find the olive).
I found a picture of a Chilean empanada on this wikipedia site, which also give details about what is considered an empanada in several different countries:
http://en.wikipedia.org/wiki/Empanadas#Chile
I don't know why the filling is called "pino"; they don't contain any pine nuts or other pine-related items. I wonder if it is a way of saying, Chilean style, i.e., a reference to the araucanian pine forests of southern Chile, which is to say, the araucanian region, the Mapuche culture. Just a guess. I'd be curious to know if anyone googles up a better explanation than that.
You can also get cheese empanadas (fried) in Chile; they are a bit smaller and more of an appetizer thing than a lunch thing. However, the little two-bite-size fried cheese morsels that are called empanadas in Argentina are called empanaditas in Chile, and are generally considered bar snacks (although KFC does serve a side of them as an alternative to the usual sides you get in the US).
Seafood empanadas are more of a special occasion thing, not to be found in little lunch shops. I can't remember if they're baked or fried. Just thinking about them now makes me want to find a recipe for them.
Contrary to what the wikipedia page says, Chilean empanadas aren't spicy, and I don't think they're typically made with aji, though some people might like to add it as a condiment.
For anyone who gets a chance to go to Santiago someday, I remember:
(1) that there was a restaurant somewhere that sold just empanadas, with several different kinds of filling. I never found it, though, to my regret, and don't know if it's still in business.
(2) That there is a bakery at the Rotunda Tomas Moro that sells fantastic empanadas by the dozen on Sunday mornings, for a good price, and a long line of people gather to get a box of them and take them home for Sunday lunch. The line moves quickly because employees move down the line taking orders in advance, so by the time you get to the window, a big cardboard box of hot empanadas is tied up and ready for you to take home. THAT is a fantastic way to spend a lazy Sunday, alone or with friends, eating a bunch of empanadas and saving the rest for late-night snacks.
(3) The big, if that's not redundant, Jumbo supermarket (at least the one on Avenida Bilbao; I'm not sure about the other ones) has a snack stand where you can take a grocery shopping break and eat an empanada, and -- and this is what I love about a country where mayonnaise is a national right and avocados are about as cheap as potatoes -- there are big pump dispensers for you to put as much mayo and palta as you want on your empanada. (On Sundays, Jumbo has another snack bar running back in the seafood section where you can get a cup of ceviche and a glass of white wine on your grocery shopping break, but that's another story.)
Now you've really got me going. Lito's or Latin Sandwich Cafe, or both, I don't care, but somehow I am going to have to get some empanadas as soon as possible!