录 iceberg lettuce, trimmed and shredded
陆 small lemon, finely grated zest only
800g/1lb 12oz large potatoes, each cut into 8 wedges
1 spring onion, trimmed and finely sliced (optional)
2 spring onions, trimmed and finely sliced
400g tin red kidney beans, drained
20驳/戮辞锄 plain flour
salt and ground black pepper
1 tsp ground cumin
陆 tsp paprika (optional)
录 tsp fine salt
2 tbsp vegetable oil, plus 2 tsp
150ml/录 pint soured cream or cr猫me fra卯che
4 seeded burger buns, split