Pre -heat your oven to Gas Mark 5/375F. Place the butternut squash on a baking tray and rub with the olive oil and sprinkle with salt and pepper. Place in the oven and bake for 45-60 minutes, until tender inside and caramelised on the outside.
Add all the raw salad ingredients to a large bowl. Mix gently to combine.
Gently stir in the roast squash, 1 tbsp Dukkah and a big pinch sumac.
Place the pittas on a griddle pan or frying pan and dry toast on a medium heat until crispy on both sides. Remove and roughly chop.
Top the salad with toasted pittas, more Dukkah and generous amounts of tahini dressing.