This green bean casserole is a classic dish that is perfect for holidays or any time you want a comforting and delicious side dish. Fresh green beans are blanched until tender, then combined with a creamy mushroom sauce and topped with crispy fried onions. Bake until bubbly and golden, then serve as a side dish for a satisfying and flavorful meal. Enjoy this timeless recipe that is sure to please everyone at the table.