500g/1lb 2oz ready cooked beetroot (not the kind prepared with vinegar), chopped
3 red chillies, deseeded if you don't want too much heat
5cm/2in cucumber, deseeded, chopped
1 tbsp fresh coriander leaves
2 garlic cloves
5cm/2in fresh ginger, peeled
2 lemongrass stalks
1 lime, juice only
1 tbsp fresh mint, chopped
2 banana shallots(or 4 round shallots), finely chopped
400ml/14fl oz can light coconut milk
salt and freshly ground black pepper
1 tsp cumin seeds
pinch sea salt
1 tbsp vegetable oil
600ml/1 pint vegetable stock
2 tbsp plain yoghurt
flatbread, to serve
4 kaffir lime leaves