Preheat your oven to 375°F (190°C).

In a large pot, bring salted water to a boil and cook the ziti according to package instructions until al dente. Drain and set aside.

In a large mixing bowl, combine the ricotta cheese, garlic powder, Italian seasoning, salt, and pepper. Stir in the chopped fresh spinach until well blended.

Add the cooked ziti and 1 cup of marinara sauce to the bowl with the spinach mixture. Stir gently to combine everything together.

In a baking dish, spread a layer of the remaining marinara sauce on the bottom. Pour the ziti and spinach mixture over the sauce. Top with shredded mozzarella and grated Parmesan cheese.

Cover the baking dish with aluminum foil and bake for 20 minutes. Remove the foil and bake for an additional 5-10 minutes or until the cheese is bubbly and golden.

Let it cool for a few minutes before serving. Enjoy your homemade Spinach Ziti straight from the oven!