This traditional favorite is perennially popular at potlucks; watch it disappear from the table. You can easily double the recipe for a hungry crowd.
Preheat the oven to 350 degrees F. Cook and drain the spinach. Combine with the soup mix and sour cream. Spoon into a buttered shallow casserole dish. Cover with the bread crumbs, dabs of butter, and the Parmesan cheese. Bake for about 35 minutes. Serve hot.