In a zip lock bag, add the cornstarch, jerk seasoning and soy sauce. Mash together. Add the sirloin strips/cubes to the bag and massage so the seasoning coats the meat. It won't look like enough, but just keep on massaging.
Set your pot to saute and when hot, add a bit of oil. Brown the pieces of beef without crowding. You will have to do this in batches. Remove to your stainless steel pot or whatever you're going to cook it in.
Add the bell peppers and saute for 3-5 minutes. Add in the garlic and saute for another 2 minutes. Remove to the pot with the beef.
Add to that beef and bell pepper mixture, the pineapple chunks, pineapple juice and jerk sauce. Stir well.
In another stainless steel pot, add the rice, water and salt. Stir. Add the pat of butter on top.
Turn off the pot and add 1 cup of water to the bottom of the Instant Pot and deglaze, making sure to get all the brown bits off the bottom. Place the trivet on the bottom.
If your stainless steel pots come with a sling, go ahead and stack them in the sling. Beef and pineapple on the bottom, steamer lid on top of that, then the rice. I don't put a lid on the rice.
If you don't have a sling, just stack them on top of each other.
Pressure on high for 12 minutes. Let the pressure COME DOWN NATURALLY for 12 minutes. Quick release any remaining pressure.
Carefully open the lid and remove your pots. Enjoy!
Just want to add a few notes here guys.