Heat butter in large skillet over medium heat. Add green onions and cook until tender. Add corn, broccoli and orzo.
Stir chicken broth, cream of celery soup and Mrs. Dash seasoning into skillet. Bring to a boil, then reduce heat to a simmer. Cover and let cook about 5-8 minutes or until mixture is hot throughout. (Stir occasionally as orzo has a tendency to stick to the pan.)