1Line casserole with left over stuffing, pressing in well and going up the sides. If you are making a very large casserole it will take 2 boxes of stuffing. Save some stuffing for the top. I like to add sauteed apples and walnuts to my stuffing it adds a nice crunch but that is optional. Make the cheese sauce and combine the turkey,and the broccoli to the cheese sauce and pour into lined casserole. spread remaining stuffing on top and bake 350 for 30-40 min.