Preparation Heat oil in heavy large pot over medium-high heat. Add eggplant, bell peppers, fennel, and garlic; sauté until eggplant is tender, about 10 minutes. Add olives and raisins, then mix in tomato sauce and vinegar. Cover, reduce heat to medium-low, and simmer 15 minutes, stirring occasionally. Uncover and simmer until caponata is thick and vegetables are tender, stirring occasionally, about 15 minutes longer. Mix in basil. Season caponata to taste with salt and pepper. (Can be made 1 day ahead. Cover and refrigerate.) Serve at room temperature.
Preparation Heat oil in heavy large pot over medium-high heat. Add eggplant, bell peppers, fennel, and garlic; sauté until eggplant is tender, about 10 minutes. Add olives and raisins, then mix in tomato sauce and vinegar. Cover, reduce heat to medium-low, and simmer 15 minutes, stirring occasionally. Uncover and simmer until caponata is thick and vegetables are tender, stirring occasionally, about 15 minutes longer. Mix in basil. Season caponata to taste with salt and pepper. (Can be made 1 day ahead. Cover and refrigerate.) Serve at room temperature.