Step 1

Hit SAUTE on pressure cooker, and when it reads hot, add olive oil and ground beef

Step 2

Cook beef until no longer pink, stirring so that it browns evenly. Add the sea salt, garlic and pepper, and stir

Step 3

Add the celery and onions, and stir

Step 4

Hit CANCEL, then add macaroni, water and diced tomatoes. Do not stir.

Step 5

Cover with lid, and turn vent to sealing position. Hit PRESSURE COOK for 4 minutes, and do a quick release.

Step 6

When pin drops, remove lid, and stir in cheese. Serve immediately, and top with additional shredded cheese, if desired