This green bean casserole is a classic dish that is perfect for holiday dinners or potlucks. Made with fresh green beans, creamy mushroom sauce, and crispy fried onions, this casserole is a crowd-pleaser. The green beans are blanched until tender-crisp, then mixed with the mushroom sauce. The sauce is made with sautéed mushrooms, garlic, and cream, creating a rich and flavorful base for the casserole. Topped with a generous amount of crispy fried onions and baked until golden and bubbly, this casserole is a comforting and delicious side dish that pairs well with roasted meats or poultry.