Score the surface of the 3 pounds gammon joint in a diamond pattern. This allows the glaze to penetrate the meat.
If you prefer a milder flavor, soak the gammon in water for a few hours or overnight to reduce saltiness. Drain before cooking.
Preheat your air fryer to 160 degrees C (or 320 degrees F).
Place the gammon in the air fryer basket. Add a small amount of wWater or stock to the bottom of the basket to create steam. Cook for about 45-50 minutes, depending on the size, until the internal temperature reaches 70°C (160°F).
While the gammon is cooking, mix 2 tablespoons brown sugar or honey with 1 tablespoon Dijon mustard and Freshly ground black pepper in a small bowl.
After the initial cooking time, brush the glaze over the gammon. Increase the temperature to 200°C (400°F) and cook for an additional 10-15 minutes, or until the glaze is caramelized and bubbly.
Once cooked, remove the gammon from the air fryer and let it rest for 10 minutes before slicing.
Slice and serve warm, with your favorite sides.