Creating Butternut Squash Cannelloni is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Squash: Cut the butternut squash in half and remove the seeds. Place it cut-side down on a baking sheet and roast for 30-35 minutes until tender.
3. Scoop the Squash: Once cooled, scoop the flesh of the squash into a large bowl.
4. Mix Filling: Add ricotta cheese, half of the mozzarella, Parmesan, egg, minced garlic, nutmeg, salt, and pepper to the bowl. Mix until smooth and well combined.
5. Stuff Cannelloni: Use a piping bag or a spoon to fill the cannelloni tubes with the butternut squash mixture.
6. Prepare Baking Dish: Spread a thin layer of marinara sauce on the bottom of a baking dish.
7. Arrange Cannelloni: Place the stuffed cannelloni in the dish, side by side, on top of the marinara sauce.
8. Top with Sauce: Pour the remaining marinara sauce over the cannelloni, ensuring they are well coated.
9. Add Cheese: Sprinkle the remaining mozzarella on top.
10. Bake: Cover the dish with foil and bake for 25 minutes. Remove the foil and bake for an additional 15 minutes until bubbly and golden.
11. Garnish: Remove from the oven and let it cool for a few minutes. Garnish with fresh basil leaves before serving.

Following these steps will guide you in creating this wonderful dish effortlessly!