In a 33 x 23-cm (13 x 9-inch) baking dish, spread a quarter of the sauce. Cover with a layer of pasta. Add another quarter of the sauce and 150 ml (2/3 cup) of cheese. Cover with another layer of pasta. Add the mushroom mixture and 150 ml (2/3 cup) of cheese. Cover with a layer of pasta. Add a quarter of the sauce and 150 ml (2/3 cup) of cheese. Finish with the remaining noodles, sauce and cheese.
Bake for approximately 45 minutes then brown under the broiler. Let stand for 5 minutes before serving.