Method

To make glaze:

1. Combine all glaze ingredients in heavy medium saucepan and bring to simmer over medium-high heat, stirring to dissolve sugar. Remove pan from heat and steep for 15 minutes. Strain through fine-mesh sieve into small bowl; discard solids.

To prepare ham:

1. Meanwhile, preheat oven to 350°F. Place carrots, celery, onion and orange wedges in bottom of heavy roasting pan. Remove all packaging from ham and discard spice-glaze package. Set ham on top of cut vegetables in roasting pan. Brush some glaze over ham. Cover ham (not roasting pan) with foil.

2. Bake until thermometer inserted into thickest part of ham registers 115°F, about 2 hours. Remove foil and brush ham with glaze. Continue to bake ham for another 30 minutes, brushing ham with glaze every 10 minutes. Glaze should be golden and caramelized and ham should be fully heated through.

To finish and serve:

1. Transfer ham to a carving board and let rest 5 minutes. Strain any pan drippings into small saucepan and skim off any excess oil. Stir remaining glaze into pan drippings and stir over medium heat until warm.

2. Set ham on platter and serve warmed glaze mixture alongside to drizzle over ham slices and enjoy.