Mix together your marinade ingredients, put your pork belly in a plastic Ziploc or bowl and add your marinade. Put in the refrigerator and let this marinate for 2-3 hours.
If you are using the storebought sauce. Do the same thing, put the pork belly in the Ziploc or bowl and add the sauce.
Mix your red cabbage and your taco sauce together, to make a slaw. Save to add onto your taco.
Set up your grill, make sure the heat is nice and hot. I used my cast iron on the grill to avoid burning my pork bellies, you can put it directly on the grill as well. I did both. I found that actually using a hybrid of both is the best method.
I like to start the pork bellies on the cast iron skillet and then I move them over to the grill side to get some nice grill marks on the meat. By cooking it in the cast iron a lot of the grease goes in there rather than into your fire. That grease creates lots of flames which can burn your meat. This method worked great.
Grease your tortillas with some olive oil and heat up on a hot pan so they puff up. Be sure to not burn them.
Plate your tacos and enjoy!
Enjoy!