Creating the Mac and Cheese Meatloaf Casserole can be a fun and manageable task. Follow these simple steps:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C).
2. Cook Macaroni: In a large pot, cook the elbow macaroni according to package instructions. Drain and set aside.
3. Prepare Meat Mixture: In a large mixing bowl, combine the ground beef, breadcrumbs, eggs, cheddar cheese, chopped onion, minced garlic, Worcestershire sauce, salt, and pepper. Mix until fully combined.
4. Incorporate Macaroni: Gently fold in the cooked elbow macaroni to the meat mixture, ensuring it’s evenly distributed.
5. Transfer to Baking Dish: Grease a large casserole dish with cooking spray or oil. Pour the mixture into the dish, spreading it evenly.
6. Add Milk: Pour the milk over the top of the casserole. This will give it moisture while baking.
7. Top with Marinara (Optional): If using marinara sauce, spread a thin layer over the top for added flavor.
8. Bake: Cover the casserole with aluminum foil and bake in the preheated oven for 30 minutes.
9. Uncover and Brown: Remove the foil and bake for another 15-20 minutes, allowing the surface to brown and become slightly crispy.
10. Let Rest: Once done, remove from the oven and let it sit for 10 minutes before slicing.

These steps will guide you in creating this incredible casserole that will surely delight everyone!