01 -
Preheat the oven to 375°F (190°C).
02 -
In a large baking dish, mix together the uncooked penne pasta, marinara sauce, water, salt, and black pepper.
03 -
Add the diced chicken breast to the pasta mixture and stir thoroughly to incorporate evenly.
04 -
Cover the baking dish tightly with aluminum foil and bake for 30 minutes.
05 -
Remove the foil carefully, stir the casserole to redistribute ingredients evenly.
06 -
Sprinkle shredded mozzarella, grated Parmesan, and Panko breadcrumbs evenly over the top.
07 -
Bake uncovered for an additional 15 to 20 minutes, or until the cheese is melted, bubbly, and golden brown.
08 -
Optionally garnish with fresh chopped herbs such as basil or parsley before serving.