Creating the Mac and Cheese Meatloaf Casserole is straightforward when following these easy steps:

1. Preheat your oven to 350°F (175°C).

2. Cook the Macaroni: In a large pot, bring salted water to a boil and cook the macaroni according to package directions until al dente. Drain and set aside.

3. Prepare the Meat Mixture: In a large bowl, combine the ground beef, ground pork, breadcrumbs, ½ cup cheddar cheese, Parmesan cheese, garlic powder, onion powder, salt, black pepper, Worcestershire sauce, and Dijon mustard. Mix until all ingredients are fully incorporated.

4. Add Eggs and Milk: In a separate bowl, whisk together the eggs and milk. Pour this mixture into the meat mixture and combine until smooth.

5. Combine with Macaroni: Gently fold in the cooked macaroni, ensuring an even distribution throughout the meat mixture.

6. Transfer to Baking Dish: Grease a casserole dish and pour the meat and macaroni mixture into it, spreading it out evenly.

7. Top with Cheese and Ketchup: Sprinkle the remaining cheddar cheese on top, followed by spreading ketchup over it for flavor and moisture.

8. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until the center is cooked through and the cheese is bubbly.

9. Cool: Once done, remove the casserole from the oven and let it cool for 10-15 minutes. This will help it set for easier serving.

10. Garnish: Before serving, sprinkle fresh parsley on top for added color and flavor.

These simple steps will guide you to create a mouthwatering Mac and Cheese Meatloaf Casserole that is sure to become a family favorite.