Place pork, diced onions and jalapeño in large resealable bag.
In a bowl, mix together tomato paste, soy sauce, spices, and brown sugar.
Add to the bag.
Pour in olive oil, bay leaves, lime juice, and orange juice.
Remove excess air, seal and freeze.
Thaw in the fridge overnight.
Cook in slow cooker on low for 7 hours.
Shred with a fork or hand mixer.
Remove bay leaves.
Put the meat on a foil lined tray.
Spoon some of the juices over top.
Broil 5-10 minutes until the edges of the meat start to brown.
Thaw in the fridge overnight.
Remove roast from bag and cut into 3 or 4 even sized chunks.
Add bag contents and roast into the instant pot.
Lock cover and seal steam nozzle.
Choose the meat setting for 50 minutes.
When pressure releases, shred pork.
Remove bay leaves before serving.
Broil 5-10 minutes until the edges of the meat start to brown.