In a medium saucepan over low heat, melt butter; blend in flour until smooth. Cook and stir for 1-2 minutes. Gradually stir in cheese until melted. Add spinach, bread crumbs, eggs and seasonings; mix well.
Spoon into an ungreased 1-1/2-qt. baking dish. Bake, uncovered, at 350° for 45-50 minutes or until lightly browned. Yield: 6-8 servings.