This spinach and mushroom casserole is a delicious and nutritious way to enjoy your greens. Fresh spinach and mushrooms are sautéed with garlic and onions until tender and then mixed with a creamy sauce made from milk, flour, and Parmesan cheese. The mixture is then topped with a layer of breadcrumbs and baked until golden and crispy. The combination of the earthy mushrooms, vibrant spinach, and creamy sauce creates a flavorful and satisfying dish that can be enjoyed as a side or a main course. This casserole is a great way to incorporate more vegetables into your diet and is sure to be a hit with the whole family.