Yield: Makes about 4 servings
Rinse cooked pasta with cold water and drain; set aside.
Combine sour cream, mayonnaise, mustard and vinegar in a large bowl. Add pasta, carrots, celery, peppers, tomatoes, green onions and chicken. Toss gently to coat evenly. Season to taste with salt and pepper.
Cover; chill in refrigerator 30 minutes. Stir before serving.
Please note that some ingredients and brands may not be available in every store.