Cook noodles according to package directions. Meanwhile, in a large skillet, saute the mushrooms in butter until tender. Add wine. Bring to a boil; cook until sauce is reduced by half, about 5 minutes.
In a small bowl, combine the cornstarch, broth and tomato paste until smooth. Add to mushroom mixture. Bring to a boil; cook and stir until thickened, about 2 minutes. Drain noodles; serve with mushroom sauce.