Step 1

Add olive oil to the inner pot of the Instant Pot and turn on SAUTE mode.

Step 2

Add diced onion to the Instant Pot and sauté for a few minutes until onion starts to soften.

Step 3

Add ground beef to the pot, break into small pieces, and cook until browned; drain excess grease and turn off the Instant Pot.

Step 4

Add Italian seasoning, garlic powder, salt, pepper and tomato paste to the beef mixture; stir to combine.

Step 5

Pour uncooked pasta shells on top of the ground beef mixture, then pour pasta sauce and water on top.  Don't stir the pasta and sauce together.

Step 6

Place the lid on the Instant Pot and put the valve in SEALING position.  Cook on MANUAL/HIGH for 5 minutes.

Step 7

Do a manual pressure release and when the pin drops, remove the lid.

Step 8

Stir in parmesan cheese, half and half and cream cheese until well combined.

Step 9

Serve and garnish with fresh parsley, if desired.