Lamb Stock

• 3 kg lamb bones
• 1 head of celery, halved
• 2 white onio

Preheat the oven to 180°C/350°F/gas mark 4.

Brown the lamb bones in a roasting tin in the hot oven until golden brown. This will take 30–40 minutes.

In a large saucepan, sauté the veg in the oil until browned, about 25–30 minutes. Stir in the tomato purée and