1 large spring onion, trimmed and roughly chopped
70²µ/2Β½΄Η³ϊ plain flour
Β½ tsp baking powder
1 tbsp cornflour
pinch gochugaru, or other red chilli flakes
Β½ tsp rice wine vinegar
pinch sea salt
Β½ tsp toasted sesame oil
Β½ tbsp soy sauce
1 tbsp vegetable oil, plus extra for frying
1 large free-range egg yolk
150²µ/5Β½΄Η³ϊ kimchi, roughly chopped, plus 1Β½ tbsp kimchi juice (from the jar)