1 large carrot, roughly chopped
2 celery sticks, roughly chopped
1 onion, roughly chopped
1 medium onion, peeled
陆 tsp dried thyme
25g/1oz butter
1 tsp English mustard
300g/10oz dried yellow split peas
1 tsp wholegrain mustard
1 bay leaf
freshly ground black pepper
10 black peppercorns
4 cloves
25g/1oz plain flour
陆 tsp finely grated nutmeg
1 tsp sea salt flakes
50g/2oz butter
5 tbsp single cream
1 free-range egg, beaten
1kg/2录lb smoked or unsmoked gammon joint, tied