Marmalade-glazed Ham

Name: Marmalade-glazed Ham
Prep time: 25 min
Cook time: 1 h 50 min
Total time: 1 h 50 min
Yield: 8 portions
Ingredients: 1 unsmoked gammon joint, boneless; 3 ½ Tbsp black treacle; 1 &frac13; tsp cloves; 2 bay leaves; 1 ½ tsp ground allspice; 1 ½ Tbsp black peppercorns; 2 oranges; water; 110 g dark brown sugar; 1 Tbsp Dijon mustard; 2 tsp dried rosemary; 7 juniper berries; 1 tsp ground cloves; 1 tsp ground cinnamon; 40 g runny honey; 200 g orange marmalade