Cook pasta as directed, drain, reserving 1/2 cup cooking water. In lg skillet, heat 2 tbsp oil over med-high heat. Add 1/2 the eggplant and cook until lightly golden and softened.
Repeat w/ remaining oil and eggplant. Season eggplat w/ salt and pepper. In lg pot, combine tomato sauce, crushed red pepper and eggplant.
Cook until heated through, over medium heat. Stir in pasta, adding cooking water as needed to make it saucy. Stir in parmesan cheese, and season w/ salt and pepper. Spoon into bowls and top w/ mozzarella chunks. Sprinkle each bowl w/ basil leaves.