Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
1                       fully cooked bone-in ham -- (5 to 7 pounds)
1         cup           packed brown sugar
2         teaspoons     prepared mustard
1         tablespoon    cider vinegar -- (up to 2)

Preparation:

Score ham about 1/2 in. deep with a sharp knife. Place ham on a rack in a shallow baking pan. Bake at 325o for 2 to 2-1/2 hours (20 minutes per pound). Combine brown sugar, mustard and enough vine- gar to make a thick paste. During the last hour of baking, brush glaze on ham every 15 minutes.