I have roasted a Gammon joint, a small one, I put it in foil and cooked it for the time suggested on the wrapper,but ten minutes before the end of cooking time, I took the joint out of the foil, basted it with a mixture of 1 Tablespoon of mustard and one Tablespoon of Honey. Put it back in the oven for the last ten minutes,after cooking time was complete, I then wrapped it back in foil to cool a little for 15mins. The result was lovely moist Honey and mustard roast ham.