Add the ground beef to the onions and garlic in the skillet. Break it up using a wooden spoon, cooking until it's browned and no pink remains. Drain any excess fat from the skillet.
Pour in the entire can of diced tomatoes, including the juices, followed by the beef broth.
Stir in your choice of dry pasta, ensuring it's submerged in the liquid. Sprinkle in the Italian seasoning, and season with salt and pepper to taste.
Reduce the heat to a simmer and cover the skillet with a lid. Cook for about 15 minutes, stirring occasionally, until the pasta is tender. Then, uncover, sprinkle generously with shredded cheddar cheese, and let it melt.
Notes
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, simply warm on the stove over medium-low heat.