Heat Oven To 375 Degrees F. Cook Pasta In Large Saucepan As Directed On Package, Omitting Salt. Remove From Pan; Drain. Meanwhile, Add Marinara Sauce, Tomatoes And Cream Cheese To Same Pan; Cook On Medium Heat 5 Min. Or Until Cream Cheese Is Melted And Mixture Is Well Blended, Stirring Frequently. Return Pasta To Pan; Mix Well. Layer Half The Pasta Mixture In 13X9-Inch Baking Dish; Cover With Layers Of Sour Cream, 1 Cup Mozzarella And Remaining Pasta Mixture. Top With Remaining Mozzarella And Parmesan. Bake 20 Min. Or Until Heated Through.