Preheat the oven to 350°F (175°C).

Cook the ziti pasta according to package instructions until al dente. Drain and set aside.

In a large bowl, combine the cooked pasta, marinara sauce, chopped vegetables, Italian seasoning, garlic powder, salt, and black pepper.

Transfer the mixture to a greased baking dish. Top with shredded mozzarella and Parmesan cheese.

Bake in the preheated oven for 25-30 minutes, or until the cheese is bubbly and golden brown.

Let it cool for 5 minutes before serving.