Cut the peppers and eggplant lengthwise into quarters and put into a large mixing bowl.
Add the garlic and coriander, to a mortar and pestle, and crush them into a chunky paste. Transfer the paste to the mixing bowl with the vegetables. Add the remaining ingredients and toss to coat well. Put on the hot grill and cook for about 5 to 7 minutes on each side.
Grill marks are great and add some texture to the dish.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.