No cans here! Fresh mushrooms, onion, and herbs with frozen green beans, sour cream, and cheddar cheese make this a delightfully tasty twist on the traditional casserole. I developed this recipe, longing for a 'no cans' version of the classic dish. I made this one year for my husband's family at Christmas time, and now they ask for it every year! My husband asks me to make it for dinner throughout the year.