Add all the spices, spaghetti sauce and broth into the Instant Pot bowl and mix it up.
Pour in the penne, smooth it out so it’s in a single layer on the top and the rest is in the sauce but do not mix or stir, it's okay that some of it is visible on top of the sauce. It is important that you do not stir the pasta in, you will get a burn notice if you do that, you just want the noodles to sink in naturally and spread the top ones evenly.
Put your lid on, and turn your knob to seal. High Pressure for 9 minutes. Do a controlled quick release when you are done. (That means vent it out slowly, when it starts splattering or bubbling, close it up let it settle for about ½ a minute and then continue venting, do this whenever you see any liquid being released)
When pressure is fully released, remove the lid and stir that pasta all up in the sauce.
Add the cheese a bit at a time and mix in, when it starts to get super stringy add your milk and stir. Then continue to add the rest of your cheese.
Serve on plates with additional shredded cheese as garnish.
Recipe by Three Different Directions at https://www.threedifferentdirections.com/instant-pot-pasta-cheesy-penne.html