If you have a layover in SAN, you have to go check out, Empanada Kitchen. Holy cow! They are amazing! I had the mushroom and goat cheese, the ham and cheese and a classic Argintenian Empanda with a cup of coffee and it was ten minutes of bliss!
Here's their web site. Next time I'm there, I'm bee-lineing for the place!
Empanada Kitchen - Happily Baked - San Diego