Cut a diamond pattern into the exposed part of the ham
Place marmalade, orange juice, dijon mustard, salt & pepper into a small saucepan. Gently warm over low-medium heat just until the ingredients begin to bubble.
Brush glaze over the ham, then place a clove in each diamond. Brush ham again with glaze and top with oranges slices.
Place water into the bottom of a baking tray with a rack and place into a preheated 180°C oven. Cook 20 minutes for each kilo, brushing glaze over the ham throughout the cook.