Press SAUTE on your Instant Pot and let it heat up. Add in the olive oil, chicken and onion.
Sauté chicken and onion in the Instant Pot for 2-3 minutes or until the outside of the chicken is seared.
Add in parsley, garlic powder, onion powder, salt and pepper. Mix well so that all chicken is coated in seasonings.
Add in egg noodles, chicken broth, water and frozen vegetables. Don't stir together - just keep everything layered and try to have as much of the noodles covered by the liquid as possible (it's okay if they are not completely covered).
Press MANUAL button and set timer for 5 minutes.
Do a quick release of the pressure. Remove the lid once the pressure is gone and stir in evaporated milk.
Press SAUTE button again.
Cook for another 2-3 minutes or until sauce thickens. Add in shredded cheese and mix until melted and sauce is smooth. Serve topped with fresh parsley, if desired
Notes
If you don't have evaporated milk, you can substitute with 1 cup of heavy cream or 1 cup of half and half. You can try regular milk, but your sauce won't be as thick and creamy.
Feel free to add other vegetables. Here are some of our favorites:
broccoli
cauliflower
green beans
peas
zucchini
squash
spinach
green peppers
If you use other fresh vegetables, they might need to cook for a little longer or you could steam them before throwing them in with the chicken and noodle mixture to make sure that they are tender.