Creating Hamburger Casserole is simple when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Cook the Beef: In a large skillet, heat the olive oil over medium heat. Add the chopped onion and minced garlic, cooking until softened (about 3-4 minutes). Add the ground beef, cooking until browned. Drain excess fat.
3. Add Tomatoes and Sauce: Stir in the diced tomatoes, tomato sauce, Italian seasoning, salt, and black pepper. Mix well to combine flavors.
4. Combine with Broth and Pasta: Pour in the beef broth and add the uncooked pasta. Stir to ensure the pasta is well coated with the sauce.
5. Transfer to Baking Dish: Pour the mixture into a greased 9×13-inch baking dish, spreading it evenly.
6. Add Cheese: Top the casserole with shredded cheddar cheese, ensuring it covers the entire surface.
7. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the pasta is cooked and the cheese is bubbly and golden.
8. Garnish: Once baked, remove from the oven and let it cool for a few minutes. Sprinkle with fresh parsley before serving.

These steps will guide you in creating this incredible Hamburger Casserole effortlessly!