Grease a 3-inch deep, 9"x13" baking dish.
Into the baking pan, arrange cooked lasagna noodles in an even layer.
Spread the noodles with 1/4 ricotta mixture.
Over the ricotta mixture, spread, 1/4 of the sauce.
Over the sauce layer, sprinkle 1/4 mozzarella cheese
Repeat for all four layers adding the remaining 1/4 cup Parmesan cheese to the top layer of mozzarella cheese.
Time to bake:
Bake in the preheated oven, covered, for 45 minutes.
Remove cover and continue cooking an additional 20 minutes.
Allow to stand 10 minutes before slicing and serve hot.