Heat 3 tablespoons olive oil in 6-quart nonstick saucepot over medium-high heat and cook eggplant, stirring occasionally, 5 minutes. Stir in remaining 1 tablespoon olive oil and onion. Cook, stirring frequently, 5 minutes or until eggplant is golden and tender. Stir in Sauce and broth. Bring to a boil over high heat. Reduce heat to low and simmer, stirring frequently, 5 minutes or until thickened.
Arrange 6 oven-proof soup bowls or crocks on cookie sheet. Evenly spoon soup into crocks, then top with mozzarella cheese, bread crumbs and Parmesan cheese. Broil 2 minutes or until cheese is melted. Serve, if desired, with crusty Italian bread.