This is a family recipe that my grandma always has to make at Thanksgiving. She's not allowed to bring anything else! Usu. I use margarine, but I would recommend sticking wtih the butter in this recipe for the best flavor. 1 lb fresh mushrooms, cleaned and sliced 1/2 cup butter 2 bunches green onions, sliced 3 lbs fresh green beans, rinsed and ends trimmed salt 1. In a large skillet, melt butter and saute mushrooms and onions until soft. 2. Add green beans and cook until tender. 3. Season with salt to taste.