Step 1

Turn Instant Pot to saute setting, and wait for the display to turn to HOT

Step 2

Add olive oil and onions, and cook until slightly soft

Step 3

Add ground beef, break up with spatula, and cook until no longer pink, stirring frequently to make sure it doesn't stick to pot

Step 4

Season with sea salt, pepper, Italian seasoning and garlic powder, and  hit CANCEl

Step 5

Add shells over ground beef, then add the marinara sauce and water. Do not stir, but press lightly with spoon to ensure pasta is completely covered with sauce and water

Step 6

Place lid on Instant Pot, close, and make sure vent is set to SEALING position

Step 7

Hit PRESSURE COOK for 5 minutes, or half the cooking time on the box of pasta

Step 8

When pressure cooking is done, do a quick release, then remove lid and hit CANCEl to turn cooker off

Step 9

Stir in heavy cream and Parmesan cheese, and serve