PREHEAT oven to 350°F. Heat oil in large nonstick skillet on medium heat. Add eggplant, onion and garlic. Cook 15 min. or until eggplant is very tender, stirring occasionally. Stir in spaghetti sauce; set aside. Mix ricotta cheese, 1 cup of the mozzarella cheese and 1/4 cup of the Parmesan cheese.
SPRAY 13x9-inch baking dish with cooking spray. Layer 3 lasagna noodles, 1/3 of the cheese mixture and 1/3 of the sauce in dish; repeat layers 2 times. Top with remaining 1 cup mozzarella cheese and remaining 1/4 cup Parmesan cheese.
BAKE 40 to 45 min. or until heated through. Let stand 10 min. before cutting to serve.