large bunch fresh basil leaves
2 carrots
2 stalks celery
4 garlic cloves
1 large onion
2 small potatoes (such as Maris Piper)
200g/7oz canned haricot beans, rinsed and drained
salt and freshly ground black pepper
4 tbsp/2陆fl oz good-quality olive oil
100ml/3陆fl oz good-quality olive oil, plus extra for drizzling
100驳/3陆辞锄 parmesan
1 ready-made bouquet garni (such as thyme, parsley, rosemary and sage)