In a large skillet over medium heat, brown the ground beef until fully cooked. Drain excess fat if necessary.
Add the chopped onion, green bell pepper, and minced garlic to the skillet. Sauté until the vegetables are tender, about 5 minutes.
Stir in the diced tomatoes, tomato sauce, elbow macaroni, beef broth, Worcestershire sauce, Italian seasoning, salt, and pepper.
Bring the mixture to a boil, then reduce the heat to low. Cover and simmer for 20-25 minutes, or until the macaroni is cooked and the sauce has thickened. Stir occasionally to prevent sticking.
If desired, sprinkle shredded cheddar cheese on top and cover until melted, about 2-3 minutes.
Serve hot and enjoy your cozy meal!