Smear the eggplant with some oil and roast directly on the flame, turning sides*. In under 7 minutes, the skin will be completely charred and the eggplant softened right through. Keep aside to cool. Peel the skin, chop flesh roughly and keep aside.
One by one, pierce the tomatoes with a fork and grill on open flame, until entire skin is charred. Each tomato will take around 2-3 minutes. Peel when cool enough to handle. Chop roughly, discarding the seeds.
In a small wok, heat 1 tsp olive oil. Fry the garlic cloves and onion slices on medium heat, till golden and soft.
In a blender, puree the eggplant, tomato and softened onion-garlic to a fine paste, using water / vegetable stock as required. Season with salt, pepper. Bring this to a simmer in a pot, adding dried basil at this stage.
Remove in bowls, topping with some olive oil and freshly crushed black pepper. I topped mine with some Cajun seasoning for a nice kick.