Add the ground beef, macaroni, diced tomatoes, broth, butter, and seasonings to a large pot.
Bring to a gentle boil over medium heat, stirring occasionally.
Cook for 10–12 minutes, until the pasta is tender and the beef is fully cooked.
Reduce the heat, stir in the cheddar cheese (or cheese packet), and mix until smooth and creamy.
Taste, adjust the seasoning if needed, and serve warm.
