Remove the lid from the pot. Add gammon to pot and arrange the vegetables, peppercorns, and bay leaves around it. Pour over the cider, then cover with the lid.
Turn dial to SLOW COOK, set temperature to LO, set time to 6 hours, and press START/STOP to begin cooking.
Meanwhile in a small bowl, mix mustard and maple syrup. Reserve for later.
When cooking is complete, allow to slightly cool, remove gammon and discard the vegetables and liquid. Wipe out pot.
Preheat oven to 200°C.
Remove skin from gammon and score. Brush gammon all over with mustard mixture. Place back into pot. Bake for 20-30 minutes until brown and glazed. Serve hot or cold.
