1In 2-quart saucepan, heat broth, onion, carrot and celery to boiling; reduce heat. Cover; simmer 15 minutes. Pour broth through strainer, pressing vegetables lightly to extract juice. Return broth to saucepan; discard vegetables.
2In small bowl, stir water, soy sauce, flour and poultry seasoning with wire whisk until smooth. Gradually stir flour mixture into broth in saucepan. Heat to boiling. Cook about 1 minute, stirring constantly, until thick and bubbly.