Preheat the oven to 350°F (175°C) and lightly grease a 13x9 inch baking pan.
In a large bowl, combine the ricotta cheese, eggs, grated parmesan, parsley, and 1 cup of the grated mozzarella; mix until evenly combined.
Spread 1 1/2 cups of spaghetti sauce across the bottom of the prepared pan.
Lay four lasagna noodles over the sauce (arrange to fit the pan; break one noodle if needed to fill width).
Spoon about one-third of the cheese mixture over the noodles and gently spread it evenly.
Top the cheese layer with 1 cup of sauce, then add another layer of noodles and repeat: cheese mixture, 1 cup sauce, noodles, cheese mixture.
Finish with a final layer of sauce on top and sprinkle the remaining 1 cup of mozzarella evenly over the sauce.
Cover the pan with aluminum foil and bake for 45 minutes, then remove the foil and bake an additional 10 minutes.
Remove the lasagna from the oven and let it stand for 10 minutes before slicing and serving.