Preheat oven to 325°F.
Add 1 cup of water to the bottom of a roasting pan.
Place the ham cut side down on the rack of the roasting pan.
9 pound cooked bone-in spiral-cut ham
In a small saucepan, combine the brown sugar, orange juice and zest, mustard, apple cider vinegar, rosemary, cinnamon, paprika, chili powder, and garlic. Simmer for 10 minutes.
1 cup dark brown sugar, 3 blood oranges, ¼ cup coarse ground mustard, 2 tablespoons apple cider vinegar, 2 teaspoons finely chopped rosemary, ½ teaspoon ground cinnamon, ½ teaspoon ground paprika, ½ teaspoon chili powder, 2 cloves garlic
Brush half the glaze over the ham, getting it into the cuts as much as possible.
Cover loosely with foil and bake for about 1 hour and 20 minutes, or until the ham reaches 140°F.
Remove the ham from the oven and increase the oven to 375°F.
Discard the foil and brush the ham with half of the remaining glaze.
Bake the ham for 15 minutes.
Brush the ham with the remaining glaze and bake for 15 minutes.
Garnish and serve.
Pomegranate arils, Rosemary sprigs, Blood orange wedges