1-2 green bird's-eye chillies, seeds removed, very finely chopped
3 tsp ground coriander
2 tbsp chopped fresh coriander
2 garlic cloves, very finely chopped or ground to a paste
2cm/戮in piece fresh root ginger, very finely chopped or ground to a paste
1 large onion, finely chopped
1kg/2lb 4oz potatoes, unpeeled, cut into wedges
ketchup
1-2 tsp mild chilli powder, to taste
2 tsp mild red chilli powder
2 tsp ground cumin
pinch salt
2 tsp salt
1 tbsp sunflower oil or rapeseed oil, plus extra for brushing
陆 tsp ground turmeric (optional)
1 tbsp rapeseed oil or vegetable oil
1 tsp freshly ground white pepper
800g/1lb 14oz lean beef mince
4-6 burger buns