World's Best Lasagna

In a mixing bowl, combine ricotta cheese with egg, remaining 2 tablespoons parsley, and 1/2 teaspoon salt.

Preheat the oven to 375 degrees F (190 degrees C).

To assemble, spread 1 ½ cups of meat sauce in the bottom of a 9x13-inch baking dish. Arrange 6 noodles lengthwise over meat sauce, overlapping slightly. Spread with 1/2 of the ricotta cheese mixture. Top with 1/3 of the mozzarella cheese slices. Spoon 1 ½ cups meat sauce over mozzarella, and sprinkle with 1/4 cup Parmesan cheese.