Brown Sugar Topping for Ham

1/2 cup brown sugar
1 teaspoon dry mustard
1 teaspoon cider vinegar
1 tablespoon warm water

Slice ham (or buy sliced). Mix ingredients in small bowl and pour over top of ham. Put foil over top so that is doesn’t touch the ham. Bake with other items (I bake mine with my Christmas Potatoes) or bake on 350 for 1 hour.