Lamb Shoulder, Charred Zucchini Purée, Labneh

Ingredients

• 1.5kg lamb shoulder, rolled and deboned
• 2 celery stalks, chopped
• 1 brown onion, diced
• 2 carrots, chopped
• 1 tbsp tomato purée
• 2 litres chicken stock
• 2 zucchinis
• 2 shallots, chopped
• 1 large green chilli, chopped
• 150ml water
• 300ml canola oil (or vegetable or sunflower oil)
• 200g natural unsweetened yoghurt
• Pinch of sumac
• Pinch of salt