Preheat the oven to 350 degrees F. Coat a large baking pan with cooking spray.
Add the butter, brown sugar, orange juice, orange zest, cinnamon and nutmeg to a pan. Place the pan over medium heat.
Bring the pan to a simmer and cook for 5-7 minutes or until glaze is syrupy.
Place the ham in the pan and pour half of the glaze over the top. Cover the ham tightly with foil. Reserve the other half of the glaze for later use.
Bake the ham for 2 hours. Uncover the ham.
Brush the remaining glaze over the ham. If the glaze has started to harden, you can microwave it for 30-45 seconds to loosen it back up.
Increase the oven temperature to 400 degrees F.
Place the ham, uncovered, in the oven. Bake for another 15-20 minutes or until glaze is caramelized and browned.
Transfer the ham to a serving platter and garnish with fresh herbs and fruit. Spoon pan drippings over the ham. Slice the ham, then serve.