Cut the top off the head of garlic. Place on a sheet of foil and drizzle with olive oil. Wrap tightly in foil and place on a rimmed baking sheet with the eggplants.
Roast the vegetables for about 45 minutes, until the eggplants are collapsed and the garlic is completely soft.
Cut the eggplants in half lengthwise and place in a colander to cool and drain. Open the garlic packet to cool.
Peel the eggplants and squeeze the flesh from the garlic head. Place all ingredients in the food processor and pulse to desired consistency. Taste and adjust seasonings.