You'll Need:

• vegetable oil
• ground beef
• yellow onion 
• garlic
• kosher salt
• ground black pepper
• Worcestershire sauce
• tomato paste
• beef broth
• cheddar cheese
• elbow macaroni dry

Add the oil to the pressure cooker and set to sauté.

1. Next, add ground beef and diced onion. Brown the ground beef, about 5 minutes.
2. Season with garlic, Worcestershire sauce, tomato paste, salt and pepper. Cook for 2 more minutes.
3. Pour in 1/4 c. of beef broth and scrape the bottom of the pot to release any pieces of beef that may be stuck to the bottom. 
4. Add the rest of the broth and macaroni. Stir well.
5. Lock the lid, turn the pressure valve to closed and set the cooking time to 5 minutes.
6. When instant pot beeps and is done cooking, quick release the steam valve. 
7. Stir in the cheese until melted and combined.