Cook Ground Beef: Set the Instant Pot to 'Sauté' and allow it to heat up until the display reads 'Hot'. Then, add the ground beef to the pot and sauté, breaking into small pieces, until fully cooked, about 6 to 8 minutes.
Season Ground Beef: Add the Italian seasoning, dried minced onion, garlic powder, salt, and pepper to the ground beef and mix well. Cook for another couple of minutes.
Add Beef Stock: Cancel the 'Sauté' mode and then add the beef stock. Stir well and deglaze the bottom of the liner.
Add Pasta & Sauce: Add the pasta to the pot and only push it down into the liquid but do not mix it in. Layer the jar of Vodka sauce on top of the pasta, do not mix. Important: Just layer the sauce on top without mixing it into the pasta.
5-Minute Cook Time: Close the Instant Pot, set it to 'Sealing', select the 'Manual' or 'Pressure Cook' function and cook on 'High Pressure' for 5 minutes.
2-Minute NPR: Once cooking has finished, allow for a 2 minute NPR (natural pressure release). Release the remaining pressure after the two minutes have completed. Once all the pressure has been released and the pin has dropped, open the pot.
Add Cheeses: Add the mozzarella and parmesan cheese and mix well into the pasta until the cheese has fully melted into the sauce.