In a large resealable plastic bag, combine the mirin, tamari and cornstarch. Add the pork; seal bag and turn to coat. Refrigerate for at least 1 hour., Cook noodles according to package directions; drain and rinse in cold water. Spread noodles over a paper towel-lined baking sheet; set aside., Drain and discard marinade from pork. In a small bowl, combine the broth, oyster sauce, mirin, tamari, cornstarch, ginger and garlic., In a large skillet or wok, stir-fry pork in oil for 2 minutes. Add the cabbage, corn, water chestnuts, bamboo shoots, mushrooms, celery and shallots; cook 4-6 minutes longer or until pork is no longer pink and vegetables are crisp-tender., Stir cornstarch mixture and add to the pan. Bring to a boil; cook and stir for 2 minutes or until thickened. Stir in snow peas; heat through., Meanwhile, arrange noodles into six nests on a greased baking sheet; spray tops with cooking spray. Broil 4-5 in. from the heat for 7-9 minutes or until tops are golden brown. Serve with stir-fry.