Green bean casserole is a popular dish in American cuisine, especially during holiday gatherings like Thanksgiving. It typically consists of cooked green beans, cream of mushroom soup, and crispy fried onions. The ingredients are mixed together and baked until bubbly and golden brown. This casserole is known for its creamy texture and savory flavor, making it a comforting side dish. It can be easily customized with additional ingredients, such as cheese or spices, to suit different tastes. Overall, green bean casserole is a staple that many families enjoy during festive meals.