There is something undeniably comforting about a classic Green Bean Casserole with Mushrooms, a dish that effortlessly bridges the gap between a hearty side dish and a delightful antipasti. This gluten-free version proves that you do not need to compromise on flavor to meet dietary needs, offering a vibrant medley of crisp-tender green beans and earthy, savory mushrooms that come together in a rich, creamy sauce. Perfect for any gathering, this recipe serves twelve people and is ready in just 65 minutes, making it an ideal choice for busy weeknights or festive holiday tables. The preparation begins with a quick sauté of fresh mushrooms and onions in olive oil, releasing aromatic notes that form the backbone of the casserole before the beans are gently cooked to preserve their bright color and texture. What sets this version apart is the luxurious addition of reduced-fat sour cream blended with the condensed mushroom soup and milk, creating a velvety sauce that is both indulgent and lighter than traditional recipes. Once combined and spooned into a baking dish, the casserole bakes to golden perfection, crowned with a generous layer of crispy French fried onions that add a delightful crunch to every bite. With a moderate calorie count of just 84 kcal per serving and a balanced nutritional profile, this dish is a guilt-free pleasure that satisfies even the most discerning eaters. Whether you are hosting a casual snack party or a formal dinner, this green bean casserole is sure to be a crowd-pleaser, offering a harmonious blend of textures and flavors that remind everyone why this timeless recipe never goes out of style.