1 stick celery, finely chopped
1 garlic clove, crushed
1 small onion, finely chopped
handful kale, spinach or other leafy green vegetable
1 small sweet potato, cut into 1cm/陆in dice
400g tin butter beans, drained and rinsed
400g tin chopped tomatoes
pinch dried chilli flakes
1 tsp tomato pur茅e
salt and freshly ground black pepper
1 tbsp olive oil
1 tsp dried oregano
1 tsp smoked paprika
200ml/7fl oz vegetable stock (made from 陆 stock cube or 陆 tsp bouillon powder)