Pulled lamb shoulder with sticky pomegranate glaze

INGREDIENTS

• 4 garlic cloves , chopped
• 2 tsp ground cinnamon
• 2 tsp ground cumin
• 1 tbsp dried oregano
• 1 lemon , quartered, pips removed
• 1½kg bone-in lamb shoulder joint
• 2 red onions , cut into wedges
• 1l carton pomegranate juice
• 2 tbsp clear honey
• 250g natural yogurt
• 100g tub pomegranate seeds, or seeds from 1 fresh pomegranate
• small handful mint leaves, chopped