Prepare the equipment: Preheat your oven to 375°F (190°C) and apply a light layer of non-stick spray or butter to a 9x13-inch baking pan.

Boil the pasta: Bring a large, heavily salted pot of water to a rolling boil. Add the elbow macaroni and boil strictly until al dente (firm to the bite) according to the package directions, then drain the pasta thoroughly and set aside.

Brown the meat: Place a large skillet over medium-high heat and add the lean ground beef. Cook the meat, breaking it apart into bite-sized crumbles with a wooden spoon or spatula, until deeply browned and fully cooked through.

Drain and simmer: Carefully drain and discard any excess grease pooling in the skillet. Pour your chosen pasta sauce directly over the cooked beef, lower the heat, and allow the mixture to gently simmer for 2 to 3 minutes to meld the flavors.

Combine the base: In a spacious mixing bowl, gently toss together the cooked macaroni, the simmered beef and tomato sauce mixture, and exactly half (1 cup) of the shredded cheddar cheese. Stir well until the pasta is completely enrobed in sauce and the cheese begins to melt.

Assemble the dish: Transfer the coated pasta mixture into your greased baking dish, using a spatula to press it gently into an even, flat layer.

Add the topping: Take the remaining 1 cup of shredded cheddar cheese and scatter it uniformly over the top of the casserole.

Bake to perfection: Place the uncovered dish into the preheated oven and bake for 20 to 25 minutes. Watch for the cheese to become fully melted, bubbling, and beautifully golden-brown around the edges.

Rest and serve: Remove the hot baking dish from the oven and allow it to sit undisturbed for 5 minutes. This brief resting period helps the casserole set up for perfectly clean portions before serving.