For the sauce, put the garlic bulb on a piece of foil, drizzle with olive oil and wrap to seal. Place on the hot barbecue with the onion and peppers. Cook, turning the veg carefully for 10 minutes, then add the tomatoes and chillies and cook all the veg until charred all over. As each item is cooked, transfer to a bowl; keep tightly covered with cling film. Let the charred veg steam in the bowl for 5–10 minutes, then peel away the onion, pepper, tomato and chilli skins. Halve and deseed the peppers and chilli. Squeeze the flesh from 4 roasted garlic cloves. Chop the veg and garlic finely and place in a bowl. Mix in the sherry vinegar, olive oil and a little seasoning.

For the tahini yoghurt, squeeze the flesh from 2 roasted garlic cloves and chop finely. Mix with the yoghurt, tahini, lemon juice and salt and pepper to taste. verifyErrors }}{{ message }}{{ /verifyErrors }}{{