3 celery sticks, diced
3 garlic cloves, chopped
2 garlic cloves, chopped
1 leek, finely chopped
1 onion, diced
½ bunch thyme, leaves removed
1 tsp fresh thyme, leaves picked and chopped
500ml/18fl oz chicken stock
1 bay leaf
500g/1lb 2oz pre-cooked chestnuts, roughly chopped
2 tbsp olive oil
2 tbsp olive oil, to serve
2 tbsp tomato purée
30g/1oz unsalted butter
2–3 Parmesan rinds
100²µ/3½´Ç³ú pancetta, diced
3 strips pancetta
1 whole partridge