Cook whole eggplant in simmering water to cover until tender, about 20-25 minutes. Cool and peel. Place onion, garlic, and parsley in a Cuisinart and chop. Add eggplant pulp and blend thoroughly. Add sugar, olive oil, lemon juice, tomato and parsley. Turn on and off a couple of times to blend. Add salt and pepper to taste. Chill mixture well.