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

2️⃣ Cook the aromatics: In a large skillet, heat the olive oil over medium heat. Add the chopped onion and minced garlic, and sauté until the onions become translucent, about 5 minutes.

3️⃣ Brown the beef: Increase the heat to medium-high and add the ground beef. Cook until browned and crumbly, breaking it up as it cooks.

4️⃣ Add the sauce and seasoning: Stir in the tomato sauce, diced tomatoes, dried oregano, dried basil, and season with salt and pepper. Bring the mixture to a simmer, then reduce the heat and let it cook gently while you prepare the macaroni.

5️⃣ Cook the macaroni: In a large pot of salted boiling water, cook the macaroni according to the package instructions until al dente. Drain well.

6️⃣ Combine macaroni and beef sauce: In a large mixing bowl, combine the cooked macaroni with the beef sauce. Mix in half of the shredded cheddar and mozzarella cheeses.

7️⃣ Assemble the casserole: Transfer the macaroni and beef mixture into a greased baking dish. Sprinkle the remaining cheddar and mozzarella cheese evenly on top, followed by the grated Parmesan cheese.

8️⃣ Bake the casserole: Bake in the preheated oven for 20-25 minutes, or until the cheese is melted, bubbly, and golden brown on top.

9️⃣ Rest and serve: Let the casserole sit for about 5 minutes before serving. This allows it to firm up slightly for easier serving.