A casserole is a delicious dish that combines various ingredients, usually baked together in a deep dish. Common ingredients include meats, vegetables, and grains, all mixed with a creamy sauce or cheese. Casseroles are popular for their convenience, as they can be prepared ahead of time and served to a group, making them perfect for family dinners or potlucks. One of the most famous casseroles is the green bean casserole, often made with green beans, cream of mushroom soup, and crispy fried onions. Casseroles are versatile, allowing cooks to get creative with flavors and textures, making them a beloved comfort food in many households.