Heat oven to 400 Spray a 9" x 13" baking pan w/ cooking spray. Cook pasta, drain.In lg, deep skillet, heat 1/4' oil over medium heat. Cook eggplant in oil until well browned on both sides, add more oil as needed.
Drain eggplant on paper towels. Reserve 1 cup spaghetti sauce. Combine remaining sauce w/ ziti pasta. Layer 1/2 the ziti mix into bottom of pan. Sprinkle w/ 3/4 cup mozzarella cheese, 1/2 the eggplant and 2 tbsp parmesan cheese. Repeat layers.
Top w/ reserved sauce and remaining mozzarella and parmesan cheeses. Bake, uncovered for 30 mins, or until bubbly and cheese is melted.