Mushroom Burger Casserole is a hearty and flavorful dish that combines the classic flavors of a burger with the earthy taste of mushrooms. Ground beef is cooked with onions, garlic, and mushrooms, then mixed with cooked pasta and a creamy sauce. The mixture is topped with cheese and baked until bubbly and golden. This casserole is a great option for a weeknight dinner or potluck gathering, and it's sure to be a hit with both kids and adults.