Place your jam a small saucepan. Heat your jam on a low heat until it is warmed through and melted.
Remove the jam from the heat and mix through your remaining ingredients. You want your glaze to be thick but a pourable consistency . Add a little bit of water if needed.
Preheat your oven to 160 degrees fan bake.
Prepare your ham. Remove the outer rind leaving as much fat on the ham as possible. Score deep lines into the top of your ham about 2 cm apart creating a diamond shaped criss-cross pattern all over. Wrap the bone end of the ham in tin foil and place your ham into a large roasting dish.
Place the ham on a low shelf in the oven for 10 minutes before using half of your glaze to cover the entire surface of your ham. Use a pastry brush or the back of a spoon to scoop and spread your glaze evenly.
Return the ham to the oven and bake for 15 minutes.
Place the rest of the glaze onto your ham, repeating the process from the first glaze. Return to the oven and bake for 15 minutes.
Rotate your ham in the oven and baste. Scoop the glaze that has dripped off into the roasting dish and brush or spoon on top of your ham paying special attention to any areas that have browned more quickly than others.
Cook for 15 more minutes before basting the ham again. Repeat this step and then remove your ham from the oven. The ham will be a dark golden colour and will have darker caramelized edges. Glaze the ham one more time with any of the dripped glaze before transferring the cooked ham to a serving dish or chopping board.