Mix ricotta, 2 cups mozzarella, 1/4 cup Parmesan, parsley and egg until blended.
Spread 3/4 cup pasta sauce onto bottom of 13x9-inch baking dish; top with 3 lasagna noodles and 1/3 of the ricotta mixture. Repeat layers of sauce, noodles and ricotta mixture twice; cover with remaining noodles and sauce.