Ground black pepper
Add oil to Instant Pot and set to saute. Add the ground beef and onion. Cook and crumble until ground beef is cooked is almost cooked through, about 5 minutes.
Add garlic, Worcestershire sauce, tomato paste, salt and pepper to pot. Cook for an additional 2 minutes.
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 of the pot
Add the rest of the broth and macaroni. Stir and make sure the macaroni is submerged into the broth. Lock the lid, seal the valve and set the pressure cooking time to 5 minutes.
When instant pot is done cooking, quick release the steam valve. Stir in the cheese until completely melted and combined.
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