Preheat oven to 350 degrees F.
Lightly grease a casserole dish. Set aside.
Cook pasta according to package.
In a small saucepan, add the dairy-free milk, vegan butter, nutritional yeast, garlic powder, and salt. Bring to a boil then simmer while whisking until nutritional yeast is completely dissolved.
Pour the cheese sauce over the pasta. Stir until pasta is evenly coated.
Spoon the pasta into the casserole dish.
Sprinkle dairy-free parmesan or a mixture of blended bread crumbs, hemp seeds, nutritional yeast, and a dash of salt on top (if using).
Cover and bake for 15-20 minutes. Serve and enjoy!