Follow these easy steps to prepare your Cheesy Brussels Sprout Casserole and enjoy a fantastic meal:

1. Preheat your oven to 375°F (190°C).
2. Prepare Brussels Sprouts: Trim and halve the Brussels sprouts. Place them in a large bowl.
3. Sauté Sprouts: In a skillet, heat olive oil and 1 tablespoon of butter over medium heat. Add the Brussels sprouts, seasoning them with salt and pepper. Cook for about 5-7 minutes until they are slightly tender but still crisp. Remove from heat.
4. Make Cheese Sauce: In a saucepan, melt the remaining butter. Stir in the heavy cream, garlic powder, onion powder, and 1 cup of shredded cheese. Cook until the cheese is melted and the sauce is smooth, about 3-5 minutes.
5. Combine Ingredients: Pour the cheese sauce over the sautéed Brussels sprouts, tossing to coat evenly.
6. Transfer to Baking Dish: Transfer the mixture into a greased casserole dish, spreading it out evenly.
7. Add Toppings: If you prefer a crunchy topping, sprinkle breadcrumbs and the remaining cheese over the casserole.
8. Bake: Place the dish in the preheated oven and bake for 20-25 minutes or until the top is golden and bubbly.
9. Garnish: Once baked, remove from the oven and let it cool for a few minutes. Garnish with fresh parsley or chives if desired.

This simple process will lead you to a dish bursting with flavor. The Cheesy Brussels Sprout Casserole deserves a place on your dinner table.