Β½ celeriac, peeled and roughly chopped
1 celery stick, finely chopped
1 garlic clove
500g/1lb 2oz mushroom duxelle (such as the one used here) or vegan mushroom ±θ²Ή³ΩΓ©
2 shallots, finely chopped
1 thyme sprig
1 bay leaf
500ml/18fl oz dark beef stock
salt and freshly ground black pepper
1 tsp black peppercorns
1–2 tbsp red wine vinegar
knob of butter
25g/1oz butter
50ml/2fl oz double cream
1 free-range egg and 1 free-range egg yolk
milk, to cover
500g/1lb 2oz puff pastry
300g/10Β½oz chicken or duck liver ±θ²Ή³ΩΓ©
500g/1lb 2oz fillet of beef
12 slices Parma ham
500ml/18fl oz red wine