Cook Noodles According To Package Directions; Drain. In A Bowl, Combine Noodles And 3/4 Cup Pizza Sauce. Transfer To A Greased 13-In.X 9-In.X 2-In. Baking Dish. Top With Remaining Pizza Sauce. Layer With The Mushrooms, Olives And Pepperoni. Sprinkle With Cheese. Bake, Uncovered, At 375 Degrees F For 15-18 Minutes Or Until Heated Through And Cheese Is Melted.