In a 9x13-inch baking dish, add the uncooked penne pasta.
Layer the cooked chicken breast over the pasta, and add turkey ham or turkey pepperoni if using.
In a bowl, mix together marinara sauce, water or chicken broth, Italian seasoning, garlic powder, onion powder, salt, and pepper. Pour this mixture over the pasta and chicken.
Sprinkle shredded mozzarella and grated Parmesan cheese over the top.
In a small bowl, combine breadcrumbs with olive oil or melted butter and mix well. Sprinkle the breadcrumb mixture over the cheese layer.
Cover the dish with aluminum foil and bake for 30 minutes.
Remove the foil and bake for an additional 10-15 minutes until the cheese is bubbly and the breadcrumbs are golden brown.
Let the casserole rest for 5 minutes before serving.
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Notes
Store leftovers in an airtight container in the refrigerator for up to 3-4 days.