Stuffed aubergine with lamb and pine nuts

Fruit and vegetables

4 medium aubergines (about 1.2kg/2lb 7oz), halved lengthways

1 small bunch coriander, chopped

1 garlic clove, finely chopped

2 tsp lemon juice

1½ tbsp lemon juice

2 medium onions (340g/12oz in total), finely chopped

20g/¾oz flatleaf parsley, chopped

salt and freshly ground black pepper