Cheesy Chicken Spinach Pasta Bake

Firstly, preheat your oven to a temperature of 375 degrees Fahrenheit (or 190 degrees Celsius).

Next, fill a large pot with water and add a pinch of salt; bring the mixture to a rolling boil. Then, introduce penne pasta into the pot and cook it with occasional stirring until it reaches a tender yet slightly firm texture, taking approximately 11 minutes to achieve.

Subsequently, drain the cooked pasta.

Subsequent to that, heat a generous amount of olive oil in a skillet over medium-high heat. Sauté the onion until it becomes tender, taking around 5 to 7 minutes.

Now, combine cooked penne pasta, sautéed onion, chicken, diced tomatoes, spinach, and cream cheese in a baking dish until the cream cheese is fully melted and coats all the ingredients.

Add mozzarella cheese on top of the pasta mixture, then cover it with aluminum foil.

Place the covered baking dish in the preheated oven and bake for 30 minutes. Remove the foil after that, and continue baking until the dish is heated through and starts to develop a golden brown color along its edges, taking approximately 15 minutes more.