In a large skillet or pot, brown the ground beef over medium heat until fully cooked. Drain any excess fat.
Add the chopped onion, green bell pepper, and minced garlic to the skillet. Cook for about 5 minutes, or until the vegetables are softened.
Stir in the diced tomatoes (with juice), tomato sauce, beef broth, Worcestershire sauce, Italian seasoning, paprika, salt, and black pepper. Bring the mixture to a simmer.
Add the elbow macaroni to the skillet, stirring to combine. Cover and cook for about 15-20 minutes, or until the macaroni is tender, stirring occasionally.
Once the macaroni is cooked, remove from heat and stir in the shredded cheddar cheese until melted and well combined.
Serve hot, garnished with additional cheese if desired.