200g/7oz portobello/shiitake mushrooms, chopped
3 celery stalks, finely chopped
2 green chillies, chopped
2 tbsp chopped fresh coriander (optional)
1 garlic clove
1 onion, finely chopped
2 x 400g tinned kidney beans, or mixed beans, rinsed and drained
salt and freshly ground black pepper
1 tsp cocoa powder (optional)
1 tbsp olive oil
100²µ/3Β½΄Η³ϊ tomato purΓ©e
150ml/5fl oz vegetable stock
150g/5oz Monterey Jack (or mild cheddar) cheese, grated
200ml/7fl oz plain yoghurt