Heat the oil in a large pan. Add the pork cubes and cook over high heat, turning several times until browned all over.
Add the onion, garlic, and jalapeno peppers and fry gently until soft. Stir in the oregano.
Add the salsa and the vegetable stock, cover, and cook on medium-low heat for 25-30 minutes, or until the meat is soft.
Before removing the pan from the heat, add the chopped cilantro and taste for salt.
Serve with warm corn tortillas or cooked rice.
Notes
Variations:
Add potatoes. Chop 3-4 medium potatoes and add them to the sauce. Basically, after you add the salsa and the vegetable stock, add the potatoes and continue cooking everything together for 25-30 minutes. Even though potatoes are already in this dish, it is still traditional in Mexico to serve it with rice- a combination that is very good, actually.
Leftovers are tasty. This dish is better if you cook it with some time before and then reheat it. I believe the flavors have time to get friendly with each other.
Refried beans or regular cooked beans can be added to the menu. Here you have a recipe on how to make authentic Mexican beans.
Fresh corn tortillas are the best, but if you prefer flour tortillas, go with them.