Caponata

Preheat oven to 400 degrees F. Pierce eggplant with a fork in several places and set on a baking sheet. Bake until the eggplant is soft when pressed, 30 to 40 minutes. Cool for 5 minutes. Peel off skin and discard. Finely chop the pulp.

Heat oil in a large saucepan over medium heat. Add onion and cook until softened and beginning to color, about 5 minutes. Add the eggplant, tomato sauce, wine, vinegar, celery, olives, capers and sugar; simmer, stirring often, until thickened, 10 to 15 minutes. Chill.

Before serving, stir in parsley and season with salt, pepper and additional vinegar, if desired. Serve at room temperature.