Set pot to saute and add olive oil. Add diced onions and chicken and cook just until outside of meat is no longer pink. Then turn pot off. Use a little bit of your broth to scrape off stuck on meat off bottom of pot (deglazing).
Sprinkle in all seasonings, add bell peppers (the smaller the pieces the softer they will get), stir everything together.
Pour in remaining chicken broth, then sprinkle in uncooked small noodles and do not stir. Just gently use the back of the spoon to submerge into the liquid below it.
Close lid and steam valve and set to high pressure for 5 minutes. Do a quick release of steam once done.
Remove lid, stir, then add heavy cream and parsley, stir together. Allow to sit for 5 minutes to thicken sauce a bit more. Then serve!