Cook the pasta according to package instructions until al dente.
In a large bowl, combine the cooked pasta, garlic, diced tomatoes, milk, oregano, and half of the shredded cheese.
Season with salt and pepper, then mix everything together.
Transfer the mixture to a baking dish and sprinkle the remaining cheese and parmesan on top.
Bake for 20-25 minutes or until the cheese is bubbly and golden.