Preheat your oven to 425 degrees Fahrenheit (220 degrees Celsius). Wash the eggplants and pierce them deeply all over with a fork to prevent bursting during roasting, and to help the heat penetrate within.
Place the eggplants on a parchment paper lined baking sheet and roast them for 40-45 minutes, or until they are tender and the skin is slightly charred.
While the eggplants are roasting, in a dry skillet, lightly toast the cumin, coriander, and Aleppo chili flakes over low heat for about 4 minutes until fragrant. Remove from heat.
Once the eggplants are done, remove them from the oven and let them cool slightly. Then, cut them in half, scoop out the flesh, and discard the skins.
Place the eggplant into a food processor along with the toasted spices, onion, garlic, tahini paste, yogurt, lemon juice, salt and olive oil.
Process the mixture until it’s smooth and well combined. If it’s too thick, you can add a bit of water to achieve your desired consistency.
Transfer the dip to a serving bowl. Drizzle it liberally with extra virgin olive oil, and garnish with sumac, pomegranate seeds, and optionally parsley or dill.