Preheat your oven to 400 degrees Fahrenheit.
As the oven is heating, you can oil a baking tray with your olive oil. Sprinkle chili flakes, cumin, and coriander onto the oil.
Slice eggplants in half and place them on the oil, with the cut side facing down. Move them around in the seasoning and oil a bit so they can pick up some flavor.
When the oven has heated, flip over the eggplants so that the cut side is facing up. Place the baking tray of eggplants into the oven and roast for 25 minutes.
When the eggplants come out of the oven, garnish them with some salt, parsley, and olive oil and then serve.