There is no ham in turkey ham. Turkey ham is processed turkey meat that is shaped to look like a ham and used as a substitute for ham.
Various parts of the turkey are cooked or cured and then ground up. Water and preservatives are added and the meat is molded into shape. Turkey ham can then be sliced and chopped more like a ham to be used as a substitute for pork in dishes that normally call for it including quiches, omelettes, sandwiches and salads. Turkey ham is made by many companies including Butterball, Jenni-O and The HoneyBaked Ham Company.