Preheat the oven to 375 degrees Fahrenheit (190 degrees Celsius).
Prepare the Lasagna noodles by following the instructions on the package. Once cooked, drain the noodles and set them aside.
In a mixing bowl, combine the ricotta cheese, Parmesan cheese, parsley, eggs, ground beef, and pepper, ensuring thorough incorporation.
Spread 1/2 cup of the spaghetti sauce evenly in a 9×13 inch (23×33 cm) baking dish. Layer half of the cooked lasagna noodles on top of the sauce, followed by half of the cheese-meat mixture. Sprinkle one-third of the mozzarella cheese over the layer.
Repeat the layering process with the remaining ingredients, ending with a layer of mozzarella cheese. Pour the specified amount of water evenly over the lasagna and cover the dish with foil.
Place the covered lasagna in the preheated oven and bake for approximately 40 minutes, or until the cheese is melted and has developed a golden-brown and bubbly appearance.
Allow the lasagna to stand for 10 minutes before serving.