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

1. Preheat the Oven: Begin by preheating your oven to 375°F (190°C).
2. Cook the Squash: In a pot of boiling water, cook the cubed butternut squash for about 10 minutes, or until fork-tender. Drain and set aside.
3. Prepare the Cream Mixture: In a mixing bowl, combine the heavy cream, garlic powder, onion powder, salt, and pepper. Mix well.
4. Mash the Squash: In a separate bowl, mash the cooked butternut squash with a fork or potato masher until smooth.
5. Combine Mixtures: Gradually add the cream mixture to the mashed squash, stirring until well blended.
6. Add Cheese: Fold in the grated cheese, reserving some for topping.
7. Grease the Baking Dish: Lightly grease a 9×13-inch baking dish with olive oil or butter.
8. Layer the Casserole: Pour the butternut squash mixture into the baking dish. Spread evenly.
9. Top with Breadcrumbs: Sprinkle breadcrumbs and remaining cheese on top of the casserole for a crunchy finish.
10. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until golden brown and bubbling.
11. Cool: Remove from the oven and let the casserole cool for 5-10 minutes before serving.

These steps will help you effortlessly create a delicious Butternut Squash Casserole that will delight everyone at your table.