Cook manicotti according to package directions. Meanwhile, in a bowl, combine the ricotta cheese, 3 cups mozzarella cheese, Parmesan cheese, eggs and seasonings. Spread 1 cup spaghetti sauce each in two ungreased 13x9-in. baking dishes. Stuff manicotti shells with cheese mixture; arrange over sauce. Top with remaining sauce.
Cover and bake at 375° for 35-40 minutes. Uncover; sprinkle with remaining mozzarella cheese. Bake 10 minutes longer or until cheese is melted and manicotti is heated through.