1Heat oven to 375. Spray a 2-quart casserole dish w/ cooking spray, set aside. In lg saucepan, cook noodles, mushrooms, stir-fry veggies and onion in boiling water for 5 mins. Drain, return to pot. In bowl, stir together soup, milk, dill, salt & pepper. Stir into noodle mix. Fold in tuna. Spoon mix into casserole dish. Cover, bake 25 min. Uncover, sprinkle w/ parmesan cheese. Cook 5 min, uncovered.