Preheat the oven to 400 degrees. Line a baking sheet with parchment paper.
Heat the leftover shredded pork until warmed through. Spoon the meat into a colander in the sink and let the juices drain completely to prevent soggy hand pies. Allow the pork to cool.
Combine the cooled shredded pork with the Oaxaca cheese, onion, jalapeño, and cilantro; mix well.
Lay your pre-made pie crust out on the counter.
Using a rolling pin, roll out the pie crust to18 inches in diameter.
Cut out 8 circles with a biscuit cutter or by using a ramekin as a guide.
Top each round with about 1 tablespoon of the mixture.
Lightly moisten the dough edges with egg wash, fold the dough over, and press with your fingers to seal.
Use a fork to press around the edges, then place them on the prepared baking sheet.
Brush the tops of each empanada lightly with egg wash.