Lamb stock

Ingredients

• 1kg chopped lamb bones (ask the butcher)
• Groundnut or grapeseed oil
• 500g lamb mince
• 180g peeled and finely sliced onion (approx. 2–3 medium onions)
• ½ star anise
• 180g sliced ripe tomato (approx. 3 medium tomatoes)
• 200g peeled and finely sliced carrot (approx. 2–3 large carrots)
• 50g finely sliced button mushrooms
• 40g finely sliced celery (approx. 1–2 sticks of celery)
• 3 cloves of garlic, peeled and finely sliced
• 75g white port
• 8 sprigs of thyme
• 1 sprig of rosemary
• 6 tarragon leaves
• 1 bay leaf