Blend together all sauce ingredients and set aside. I use a fork or whisk because I'm in a hurry but a small immersion or stick blender would do a better job.
In a liquid measuring cup, stir together the warm water, sriracha, soup base and rice vinegar.
Place chicken breast tenderloins in instant pot in a single layer. It's okay to have a little overlap but you don't want pieces stacked on top of each other. Add the water/sriracha mixture and close the lid.
Set to pressure cook. I use 8 minutes for frozen or 6 minutes for thawed. Once the cook time is finished, I generally do an 8 minute natural release and then quick release whatever steam remains. You may need to reduce this slightly depending on the size of your breast tenders.
While the chicken is cooking, prep the toppings (tomatoes, green onions and cabbage)
Once chicken is done, remove it to a plate and shred with a fork.
Discard all but a tablespoon or so of the liquid in the Instant Pot, then return the shredded chicken to the pot so that it can soak up the remaining tasty liquid.
Heat tortillas according to package directions (for simplicity we use a microwave but a skillet would be fine, too). Layer a mound of shredded chicken in the center of each tortilla then top with cabbage, tomato and green onion.
Drizzle with Bang Bang Sauce
Enjoy!