Heat olive oil in a large skillet over medium high heat. Add eggplant and cook until slightly softened, about 5 minutes. Add garlic and continue cooking until eggplant is completely softened, about 5 more minutes. Puree in a food processor or, if you want to remove all the seeds, pass through a food mill. Add remaining ingredients, adjusting seasoning to your taste. Stir in green onions or chives and serve with pita chips for dipping.
