Melt butter in large saucepan over medium heat
Add onion, carrots, and celery
Cook until vegetables are soft (5-7 minutes)
Add garlic, cook 1 minute
Sprinkle flour over vegetables, stir to coat
Cook flour mixture 1 minute
Gradually add broth and cream, stirring constantly
Bring to simmer, cook until thickened (3-4 minutes)
Add chicken, peas, corn, herbs, salt, and pepper
Simmer 2-3 minutes until heated through