PREPARATION:

1. Bring broth to a boil in large saucepan. Add onion; reduce heat and simmer 3 minutes. Add turkey; return to a boil. Reduce heat; cover and simmer 7 to 9 minutes or until turkey is no longer pink. With slotted spoon, transfer turkey to 13X9-inch baking dish.
2. Return broth to a boil. Add potatoes, rosemary, salt and pepper; simmer 2 minutes. Return to a boil; stir in mixed vegetables. Simmer, covered, 7 to 8 minutes or until potatoes are tender. With slotted spoon remove vegetables to colander set over bowl; reserve broth. Transfer vegetables to baking dish with turkey.
3. Preheat oven to 375°F. Blend 1/3 cup milk and cornstarch in small bowl until smooth; set aside. Add enough additional milk to reserved broth to equal 3 cups. Heat in large saucepan over medium-high heat. Whisk in cornstarch mixture, stirring constantly until mixture comes to a boil. Boil 1 minute; remove from heat. Pour over turkey-vegetable mixture in baking dish.
4. Roll out crescent roll dough and separate at perforations; arrange dough pieces decoratively over top of turkey-vegetable mixture. Bake 13 to 15 minutes or until crust is golden brown.