Green Bean Casserole is a classic American dish that is perfect for any occasion. It is made with fresh green beans, cream of mushroom soup, and crispy fried onions. The dish is easy to make and can be prepared in advance, making it a great option for busy weeknights or holiday dinners. The creamy mushroom sauce and crispy onions add a delicious flavor and texture to the tender green beans. Serve it as a side dish or as a main course with some crusty bread.