Creating Butternut Squash Casserole is straightforward if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×9-inch baking dish.
2. Cook the Squash: In a medium pot, boil water and add the cubed butternut squash. Cook until tender, about 10-15 minutes. Drain and set aside.
3. Prepare the Quinoa: If not previously done, rinse and cook quinoa according to package instructions. Set aside once cooked.
4. Mix Ingredients: In a large bowl, combine the cooked squash, quinoa, cheddar cheese, Parmesan cheese, milk, eggs, garlic powder, onion powder, salt, pepper, and nutmeg. Mix until well blended.
5. Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading it out evenly.
6. Add Topping: In a small bowl, combine breadcrumbs and olive oil, then sprinkle over the top of the casserole.
7. Bake the Casserole: Place the baking dish in the preheated oven and bake for 35-40 minutes, or until the top is golden brown and crispy.
8. Cool and Garnish: Once done, remove from the oven and let it cool for a few minutes before garnishing with fresh parsley.

By following these steps, you’ll create an incredible Butternut Squash Casserole that is sure to impress!