They look yummy! Here is a tip that I use when making empanadas ... I make the "pino" or the meat part of it the day before. That way it has a whole night at least to sit in the fridge and get nice and cold. The colder it is to work with, the less chance that you have of it leaking out when you cook it. ALSO ... I remove a lot of the liquid from it (but not all,cus you don't want it dry) before I put it in the fridge to cool ... also helps to stop them from opening and leaking out when cooking.
You can also try so many other things inside the empanada. That is the amazing thing about the empanada ... they are like little pockets of your favorite food. I have made a veggie version with spinach as well as a cheese one and my mom has made a seafood version.
Great that you posted the recipe ... I have so many friends that ask but I guesstimate when I make it so can m=never give a proper recipe ... I am going to pass this one along for sure!