Preheat oven to 350°. Mix together the egg, ricotta, 1-1/2 cups mozzarella cheese, feta, Parmesan, basil, garlic and pepper., Spread 1/2 cup pasta sauce into a greased 13x9-in. baking dish. Layer with 3 lasagna noodles, 3/4 cup ricotta mixture, 1 cup spinach and 2/3 cup sauce. Repeat layers twice. Sprinkle with remaining mozzarella cheese., Bake, covered, 35 minutes. Uncover; bake until lasagna is heated through and cheese is melted, 10-15 minutes. Let stand 5 minutes before serving.