Smoky Harissa Butter Beans with Charred Aubergine & Herby Tahini

Name: Smoky Harissa Butter Beans with Charred Aubergine & Herby Tahini
Cuisine: Moroccan, African
Ingredients: 1 large aubergine, cut into thick wedges; 1 tbsp extra virgin olive oil; Sea salt and black pepper; For the butter beans; 1 tbsp extra virgin olive oil; 1 red onion, finely sliced; 3 garlic cloves, finely chopped; 1 tsp smoked paprika; 1 tbsp rose harissa; 2 tbsp tomato purée; 400g tin butter beans, drained; 150ml vegetable stock; Juice of ½ lemon; 2 tbsp tahini; Juice of ½ lemon; Small handful parsley; Small handful coriander; 1 small garlic clove; 2-3 tbsp water; Pinch of sea salt