Sweet and sour stuffed aubergines

INGREDIENTS

• 2 medium aubergines
• , for sprinkling salt
• 4 tbsp tomato purée
• 1 lemon
• 2 tbsp caster sugar
• 2 tbsp extra virgin olive oil
• 150ml/5fl oz water
• salt and freshly ground black pepper
• 1 onion
• 2 garlic
• 300g/11oz minced beef
• 1 heaped tsp ground cinnamon
• 1 heaped tsp ground cumin
• 2 tomatoes, deseeded and finely chopped
• water, to cover
• 3 tbsp bulgur wheat
• 30g/1oz pine nuts
• 30g/1oz currants