Spread a thin layer of sauce on the bottom of a greased 9x13 inch baking pan.
Top with a single layer of noodles, 1/2 of ricotta mixture, 1/3 of vegetable mixture, and 1/2 of sauce.
Repeat.
Top second sauce layer with remaining vegetables, 1 c. shredded mozzarella, 1/2 c. shredded parmesan, and 1/2 tsp. dried oregano.
Cover with foil; bake at 375 degrees for 1 hour.