COOK and stir celery and onions in butter in large saucepan on medium heat 8 min. or until tender. Add flour; cook 3 min., stirring constantly.
WHISK in milk, then broth until blended. Cook 10 min. or until thickened, stirring constantly.
STIR in spinach and artichokes. Bring to boil. Add cooking creme and Parmesan; cook and stir on medium-low heat 2 to 3 min. or until heated through.