Chinese-style sticky lamb ribs

Ingredients

• 1 tablespoon olive oil
• 1.5 kilogram lamb riblets
• 1 medium orange, halved crossways
• 55 gram piece fresh ginger, unpeeled, sliced
• 6 garlic cloves, unpeeled, bruised
• 3 shallots, unpeeled, halved
• 2 fresh long red chillies, coarsely chopped
• 2 cinnamon sticks, broken in half
• 3 whole star anise, cracked
• 1/2 cup shao hsing (Chinese cooking wine)
• 1/2 cup salt-reduced soy sauce
• 1/3 cup honey
• 1 cup beef stock
• 1 cup water
• 1 bunch gai lan (or Chinese broccoli, see recipe tip)
• 1/2 cup roasted unsalted cashews, coarsely chopped