Boil chicken with water and ginger until tender. Reserve the liquid. Soak noodles in warm water for a few minutes until soft. Cut chicken into bite-size pieces. In large skillet, saute garlic in oil; add onion, celery and carrots and cook until tender. Gradually add chicken, noodles and liquid a little bit at a time. Add salt, pepper and soy sauce. Garnish with green onions.