In a skillet over medium heat, add the chopped onion and minced garlic. Sauté until the onion becomes soft and translucent, about 3 to 5 minutes.

Add the ground beef to the skillet, using a spoon to break it up as it cooks. Continue to cook for about 6 to 8 minutes or until it is browned thoroughly.

Drain any excess fat from the skillet to ensure a leaner dish.

Stir in the diced tomatoes, beef broth, Italian seasoning, salt, and pepper. Mix everything thoroughly.

Bring the mixture to a simmer, then reduce the heat. Let it cook for 10 to 15 minutes, stirring occasionally.

If desired, sprinkle the shredded cheese on top during the last few minutes of cooking, allowing it to melt into the dish.