The green bean casserole has long been a much-loved thanksgiving side dish, as popular as cranberry sauce, dressing, and mashed potatoes. The casserole's rise to turkey day fame began in 1955, when the campbell soup company combined its cream of mushroom soup with canned green beans. French fried onions provided the signature crunchy topping. Since then, home cooks have been adding their personal touches to the classic casserole year after year. This updated version uses fresh green beans, two kinds of cheese, and a secret weapon: the instant pot. The green beans pressure-cook to perfection in record time with a bit of garlic and minced shallots. All you have to do is assemble the casserole and bake it for about 15 minutes.