Make the Ricotta Filling: Add the ricotta, egg, lemon juice, black pepper, parmesan, parsley, and chopped basil to the mixing bowl. Stir until well combined.
Boil the Pasta: Bring a large pot of salted water to a boil. Add the lasagna noodles to the boiling hot water and cook for 8 minutes, stirring occasionally to prevent them from sticking. Remove the noodles from the water and drain.
Assemble the Lasagna: Pour roughly 1 cup of sauce into the casserole dish and spread it out to coat the bottom of the dish. Add 4 lasagna noodles, lengthwise, to the casserole dish (it’s ok if the edges overlap a little bit), then spread a heaping 1/2 cup of the ricotta mixture over the noodles, next sprinkle over 1 1/4 cups of mozzarella cheese, and then pour around 2 cups of marinara sauce. Repeat for the second layer. For the third and final layer, you will skip the mozzarella cheese. Instead add a layer of noodles, the ricotta mixture, and then pour over any remaining marinara sauce.
Bake the lasagna uncovered at 400 degrees for 25 minutes.
Remove the lasagna from the oven and top with the remaining mozzarella cheese. Return to the oven and bake for another 15-20 minutes or the edges of the lasagna are bubbly and the cheese is fully melted and starts to become golden brown.
Let the lasagna sit for 15-20 minutes and garnish with grated Parmesan cheese and chopped fresh basil before serving.