From my Aunt Alta's recipe collection. My first memory of my Aunt Alta is visiting at her house in Illinois when I was a young girl, when she served us a huge holiday ham dinner(even though we were visiting her in the summer). I had never had a ham before, since my mother never served pork dishes in our house. I loved it and now I make a holiday ham for Christmas each year. She decorated the ham with pineapple rings and maraschino cherries place into the center of each ring,using whole cloves to pin them into place. I am guessing on the size of the ham here - her instructions were only for a half ham or a whole ham. Since the ham is to be a precooked one, the cook time is really just to fully heat the ham and cook the glaze, so use the appropriate heating time that your ham wrapper indicates for the size ham you have purchased. If your wrapper suggests a different temperature as well, then use that temperature, adjusting it to fit the recipe temp only after adding the glaze. I recently inherited my Aunt's recipes, and this was buried in her recipe files, splattered and crinkled and torn at the edges. She originally got the recipe from the back of a molasses bottle. I serve this with a hot fruit sauce on the side as a gravy.