Fill large saucepan 1/2 full and bring to a boil
Slice celery into long, thin strips
Add celery to boiling water, cover, and boil 15-20 minutes, until soft and noodle-like
Drain and transfer celery to bowl/plate
Stir dressing into noodles
Cut chicken into strips or bites
Combine mustards, Stevia and garlic power in small bowl
Add chicken and stir until well coated
Place chicken on top of celery noodles