small saucepan; blend in remaining broth. cook mixture over medium heat, stirring constantly until mixture boils. cook, stirring constantly, until mixture is thick, about 1 minute.
gradually stir 2 tablespoons of the hot mixture into the 1/2 cup sour cream; slowly stir sour cream into hot mixture. remove from heat.
place chicken on serving platter; remove string from legs. serve chicken hot with noodles and gravy. 