1Heat oven to 350°F. Spray 8-inch square (2-quart) glass baking dish with cooking spray. Cook and drain linguine as directed on package, using minimum cook time.
2Return cooked pasta to saucepan; stir in soup, spinach and milk. Stir in tuna, roasted peppers and linguine. Spoon pasta mixture into baking dish. In small bowl, mix bread crumbs, cheese and melted butter; sprinkle over tuna mixture.
3Bake uncovered 40 to 45 minutes or until bubbly around edges and top is golden brown. Let stand 5 minutes before serving.