450g/1lb shelled broad beans, thawed if frozen, blanched and skins removed
1 stick celery, thinly sliced
handful fresh mint leaves, chopped
4 small sprigs fresh mint
1 onion, chopped
1 generous sprig fresh summer savory or thyme
2 tbsp pudding rice
salt and freshly ground black pepper
paprika or cayenne pepper, for dusting
1 litre/1戮 pints hot chicken stock or vegetable stock
30g/1oz butter
115ml/4fl oz Greek-style yoghurt