Preheat the oven to 325 degrees F. Score the top of the ham in a diamond pattern; making shallow cuts about 1" apart. Place the ham in a shallow, parchment paper-lined baking pan. Bake the ham for 25 minutes. While the ham bakes, make a glaze by combining the remaining ingredients in a bowl. After the ham has baked for 25 minutes, brush it with the glaze. Bake for 25 minutes more. Rest the ham 5 minutes, before slicing and serving.
Note: 1/4 hams (a whole, boneless ham cut into 4 pieces) are available in the meat department.