Preheat oven to 200C/400F/Gas 6
Roast in the oven until the sweet potato is soft and browned (20-30 mins). Remove the dish from the oven and set aside.
In a large jug or food processor, combine all the contents of the oven dish with the chickpeas, 2 tb tahini, 150ml stock, 75ml lemon juice and the smoked paprika.
Use a stick blender or process until combined and smooth. Add more stock, lemon juice, tahini, seasoning, smoked paprika or ground cumin to achieve your preferred taste and consistency.
Leave in the fridge for an hour or so to meld the flavours. Best served at room temperature