Rinse and dry the pork shoulder, rub all over with salt and pepper.

Combine the rub ingredients then rub all over the pork.

Place the pork in a slow cooker (fat cap up), top with the onion, jalapeño, minced garlic, and squeeze over the juice of the oranges.

Slow cook on low for 10 hours or on high for 7 hours.

Remove the pork from the slow cooker and let cool slightly. Then shred using two forks.

Optional: Skim off the fat from the juices remaining in the slow cooker and discard.

If you have a lot more than 2 cups of juice, then reduce it down to about 2 cups.

Heat 1 tablespoon of oil in a large non-stick pan or well-seasoned skillet over high heat. Spread pork in the pan and drizzle over some juices.

Wait until the juices evaporate and the bottom side is golden brown and crusty. Turn and briefly sear the other side.

Remove pork from skillet. Repeat in batches.

Just before serving, drizzle over more juices and serve hot, stuffed in tacos.