Black bean soup recipe

Ingredients

• 2 tbsp olive oil
• 2 red onions, finely chopped
• 4 garlic cloves, chopped
• 1 fresh green chilli, deseeded if you prefer and finely chopped
• 1 chipotle chilli, finely chopped
• 1 tsp dried oregano
• 2 tsp ground cumin
• 2 tsp ground coriander
• 1 tsp ground allspice
• 0.5 red pepper, deseeded and finely chopped
• 2 celery sticks, finely chopped
• 500 g dried black kidney beans, soaked and cooked or 800g drained tinned beans
• 1 tbsp tomato puree
• 1 l vegetable stock
• 30 g dark chocolate, finely chopped
• 1 good pinch of salt
• 3 tbsp soured cream to serve