In a large oven-safe pan, combine the pasta, marinara sauce, water, Italian seasoning, and any optional vegetables.
Stir everything together until well mixed.
Cover the pan with foil and bake for 20 minutes.
Remove from the oven, uncover, and sprinkle the mozzarella and Parmesan cheese on top.
Return to the oven and bake uncovered for an additional 10 minutes, or until the cheese is bubbly and golden.