This garlicky spread is made with grilled eggplant; serve it with pita bread.
Heat grill to high. Pierce eggplants several times with a sharp knife. Place on grill. Cover; cook, turning occasionally, until blackened all over and flesh is very soft, 20 to 30 minutes. When cool enough to handle, halve lengthwise. Scrape flesh into a colander (discard skins); let drain.
Process tahini, lemon juice, garlic, 1 1/2 teaspoons salt, and 1/4 teaspoon pepper in a food processor until smooth. Add eggplant; process until smooth.
Transfer mixture to a serving dish. If desired, drizzle with oil, and garnish with parsley or olives.