Roast turkey breast with apricot, gammon and pistachio stuffing

Ingredients

• 1 x 1.7kg boneless turkey breast, at room temperature
• 1 onion, roughly chopped
• 1 carrot, roughly chopped
• 1 stick celery, roughly chopped
• 2 bay leaves
• 2 tbsp goose fat or soft butter
• 200ml dry white wine
• 500ml chicken stock
• 1 x smoked rindless gammon steak, about 150g (from a pack of 2)
• 1 tbsp flavourless oil, eg sunflower
• 25g butter
• 1 medium red onion, finely chopped
• 2 celery sticks, finely chopped
• 2 garlic cloves, crushed
• 4 good-quality pork sausages, skins removed
• 75g dried apricots, very finely chopped
• finely grated zest of 1 lemon
• 1 x 28g pack flat-leaf parsley, leaves chopped
• 6 sage leaves, roughly chopped
• ¼ whole nutmeg, grated
• 50g pistachio kernels, finely chopped
• 50g white breadcrumbs
• 1 medium egg, beaten