This is what you need to make for those friends and family who claim they don't like aubergine. It's the perfect way to showcase aubergine - it's smoky, it's custardy soft and it's packed with flavour. This one will have Ottolegnhi quaking in his boots. Works as a side or main with bread and crispy chickpeas.
Preheat oven to 200 degrees fan or 220 degrees C. Leaving them whole, drizzle the aubergines with plenty of olive oil and sprinkle with salt. Place into the oven for 30 minutes.
Grate the tomato over a sieve and season with salt. Discard (or drink!) the tomato juice and transfer the thick tomato pulp to a bowl and combine with the other ingredients. Season to taste.
In another bowl, mix together the tahini and lemon juice slowly adding in water until you get a drizzleable sauce (about the consistency of double cream). Season to taste and set to one side.
Once cooked, cut the aubergines lengthwise down the middle and fold out. Allow any juices to drain out for a few minutes then spoon plenty of hummus onto a large plate, smooth around then top with the whole aubergines. Top with the tahini sauce, tomato sauce, plenty of fresh parsley, sumac and olive oil. Serve with bread, cous cous, rice or on its own.