This Brussels and Three-Cheese Pasta Bake is a delicious and comforting dish that combines the flavors of Brussels sprouts and three different types of cheese. The Brussels sprouts are roasted until crispy and then mixed with cooked pasta, a creamy cheese sauce, and a blend of Parmesan, mozzarella, and Gruyere cheese. The dish is then baked until golden and bubbly, creating a cheesy and flavorful pasta bake that is perfect for a cozy dinner or a holiday gathering.