200 ml honey
3 oranges, julienne rind and juice only
2 tsp powdered mustard
1 tsp cloves, plus extra for studding
7 kg ham leg (smoked)
To serve: watercress
To serve: mustard fruits (see note)

1 Heat honey in a saucepan over medium heat for 5 minutes or until dark golden, then add orange juice and rind, mustard and cloves and simmer for 10 minutes or until reduced by half. Cool to room temperature.
2 Preheat oven to 180C. Remove skin from ham and discard. Score fat in a crisscross pattern, stud with remaining cloves in the centre of each diamond.
3 Place ham on a rack in a large roasting pan. Half fill roasting pan with water and brush ham liberally with glaze. Roast, basting frequently with remaining glaze, for 1 hour, or until golden.

Note Mustard fruit, also called mostarda di Cremona, is candied fruit preserved with mustard oil, available from gourmet food stores.