Turn Instant Pot to saute mode. Once heated add the olive oil and ground beef. Break the beef up with a wooden spoon and cook until browned. Turn Instant Pot off.
Add the Italian seasoning, onion powder, garlic powder, salt, pepper and water. Stir until well combined, scraping up any browned bits from the bottom of the pot.
Break the spaghetti noodles in half and lay them in the pot in about 5 parts, with each part laying in a different direction (this is to prevent the spaghetti from sticking together).
Then pour the marinara sauce over the spaghetti. Do not stir.
Seal the pressure cooker. Cook at high pressure/manual for 7 minutes.
Carefully do a quick release. Remove lid, stir. You will see some liquid in the pot. This will absorb after just a few minutes. Wait for 3-5 minutes and then serve.
Serve with parmesan cheese and ENJOY!
Notes
If using whole wheat spaghetti with a package cook time of 7-9 minutes. Cook at high pressure/manual for 5 minutes. If using regular spaghetti with a package cook time of 9-11 minutes, Cook at high pressure/manual for 7 minutes.