Combine broth and cornstarch in a small saucepan. Bring to a boil, and cook 1 minute, stirring constantly. Gradually add hot broth mixture to egg yolks; stir constantly with a whisk. Return broth mixture to pan; cook over medium-low heat 15 minutes or until thermometer registers 160°. Pour into a bowl; stir in parsley and remaining ingredients. Cover and chill. Serve with steamed fresh vegetables such as artichokes, carrots, and potatoes, if desired.