1- Boil salted water in a large pot and cook 1 pound of uncooked penne pasta for about 10 minutes, making sure it’s slightly undercooked to prevent sogginess when baked.

2- In a skillet, heat 1 tablespoon of olive oil over medium-high heat and add 1 pound of lean ground beef along with 1/2 chopped medium onion; sauté for around 10 minutes, breaking up the meat as it cooks.

3- Add 1 minced garlic clove partway through the cooking to enhance the flavor without overpowering the dish.

4- Drain any excess fat from the skillet, then stir in 1.5 cups of marinara sauce, seasoning with salt and pepper to taste, and heat everything through for a few minutes.

5- Drain the cooked pasta and transfer it to the prepared baking dish; pour the beef and sauce mixture over it, tossing gently to combine evenly.

6- Spread the mixture smoothly in the dish and top with 1.5 cups of shredded cheddar cheese; bake uncovered for 10 minutes until the cheese melts, then broil briefly for a browned top if desired.

7- Serve immediately for the best texture and flavor, making this a quick family favorite.