Preheat oven to 350°. Cook noodles according to package directions for al dente, adding peas during the last minute of cooking; drain., Meanwhile, in a large bowl, combine soup, sour cream, cheese, milk and salt; stir in tuna, onion and pepper. Add noodles and peas; toss to combine., Transfer to an 11x7-in. baking dish coated with cooking spray. In a small bowl, toss bread crumbs with melted butter; sprinkle over top. Bake, uncovered, 25-30 minutes or until bubbly.