To prepare dressing, combine broth and cornstarch in a small saucepan, stirring with a whisk; bring to a boil. Cook 1 minute, stirring constantly. Remove from heat; stir in juice and next 5 ingredients (juice through peppercorns). Cool.
To prepare salad, combine shrimp and remaining ingredients in a large bowl. Add dressing mixture to shrimp mixture, tossing well.