Set your Instant Pot to sauté function. Add ground beef/sausage, garlic and onions into your pot. Once the pot bottom is heated, begin to sauté your meat, garlic and onions. Cook until everything is completely cooked. Cancel sauté function and drain excess oil from pot.

Add broken spaghetti, Italian seasoning crushed tomatoes, tomato sauce, and water to your pot. Stir spaghetti a few times so they are not all clumped together and make sure spaghetti is completely submerged in liquid. Seal your Instant Pot. Set it to manual mode, high pressure, 5 minutes cooking time.

When Instant Pot beeps to indicate it is done, do a manual quick release. Open lid when it is safe to do so. At first, it may appear that your pasta sauce has too much liquid, but if you stir the spaghetti a few times with the lid open, the liquid will evaporate and your sauce will thicken. Scoop out spaghetti. Garnish with fresh basil leaves, parmesan cheese, fresh ground pepper or anything else you desire.