This spinach and mushroom casserole is a healthy and flavorful dish that is perfect for vegetarians. It's made with sautéed spinach, mushrooms, onions, and garlic, creating a delicious and nutritious filling. The spinach is wilted until tender and combined with the sautéed mushrooms, onions, and garlic, adding a depth of flavor to the dish. The filling is then mixed with a creamy sauce made with milk, flour, and Parmesan cheese, creating a luscious and velvety texture. Topped with a sprinkle of breadcrumbs and baked until golden and crispy, this casserole is a satisfying and comforting meal that can be enjoyed any time of the year.
