Cut chicken breasts into ¾-inch chunks. Place chicken in a mixing bowl, then add oil, coconut aminos, and 1 tablespoon of Chinese five spice. Mix well and set aside to marinate while you prep the veggies.
Prep the broccoli: cut away the large pieces of stalk from the head of broccoli, leaving as much as possible for each floret. Then run your knife through each floret to make longer, thin pieces.
Using the sauté setting, add chicken and marinade to the pot and cook for about 7 minutes, stirring frequently, until chicken is nearly fully cooked.
Then add veggies to the pot, top with 1 tablespoon of Chinese five spice, and give a good mix.
Lock the lid and set the timer for 0 (zero) minutes. The food continues heating while the pot comes up to pressure; once full pressure is reached, the programmed cook phase ends immediately.
Once cook time is complete, quick-release the pressure. Mix again, check that the thickest pieces of chicken have reached 165°F, and serve.