In a saute pan heat 4 tablespoons of the olive oil, add the eggplant, and saute until soft and browned, about 10 minutes. Remove and place in a bowl. In the same pan, heat the remaining oil, and cook the onion, fennel, and peppers. Saute until soft, about 4 minutes. Add the garlic, tomato, vinegar, cooked eggplant, sugar, salt and pepper. Bring to a boil, reduce heat, and simmer for 10 minutes. Stir in the capers and simmer for 5 minutes. Stir in the olives, pine nuts and basil. Simmer until all vegetables are tender.