Ham hock & mustard terrine

INGREDIENTS

• 2 small ham hocks, approx 1kg/2lb 4oz each
• sunflower oil , for greasing
• 2 tbsp wholegrain mustard
• small handful parsley , chopped
• 1 sheet gelatine
• caper berries, to serve
• caper berries and toasted bread , to serve
• 500ml cider
• 2 carrots , chopped
• 2 celery sticks, chopped
• 1 large onion , chopped
• 2 bay leaves , fresh or dried
• 6 thyme sprigs
• 3 star anise
• 6 whole peppercorns