Lobster Sauce

• 675 g/1½ lb lobster shells
• 25 ml/1

Preheat the oven to 180°C/350°F/Gas Mark 4.

Chop up the shells so that they are quite small. Heat the oil in an ovenproof pan, add the mirepoix of vegetables and the garlic, cover with a lid and sweat over a medium heat, stirring occasionally, until the vegetab