- Boil the ham twice in a large casserole filled with water for 15 minutes each time. Throw away the water and set the ham aside on an oven-safe plate. Set the grill at the bottom of the oven. Preheat the oven to 350°F (180°C).
- In a casserole, boil brown sugar with orange juice, beer, cinnamon, and cloves for 15 minutes. Remove cinnamon and cloves. Add sliced leeks and orange marmalade. Reduce by half.
- Pour over the ham. Cover and oven-bake for 2 hours. Remove the lid and cook for 1 hour while frequently spraying with its cooking juice. Set aside ham on a serving plate covered with aluminum paper. Add cooking juice to the leeks in a casserole and reduce it to half.
- Slice ham and serve with maple cooking juice, Brussels sprouts and mashed potatoes.