Green Bean Casserole is a popular dish in American cuisine, especially during holiday gatherings like Thanksgiving. It typically consists of green beans, cream of mushroom soup, and crispy fried onions, all baked together to create a creamy and savory side dish. The casserole is easy to prepare, often using canned or frozen green beans for convenience. It is known for its comforting flavors and crunchy topping, making it a favorite among families. Many variations exist, incorporating ingredients like cheese or different seasonings to enhance the dish's taste.