Cook pasta according to package directions; rinse & drain.
Combine cooked pasta & turkey in large bowl. In separate bowl, combine milk, eggs, mustard, worcestershire sauce & pepper. Gradually stir cheeses into milk mixture. Stir milk mixture into pasta.
Spoon pasta mixture into well sprayed 3 qt casserole dish. Combine melted butter & garlic powder in a small bowl. Stir in bread crumbs until evenly coated. Sprinkle bread crumb mixture over top of pasta.
Bake 25 - 30 minutes or until pasta mixture is heated through & cheese is melted.