Step 1 of 5

Make the chilli oil

Heat the vegetable oil in a small heavy pot over medium heat. Add the gochugaru and stir for 30 to 45 seconds until the oil turns deep red and smells toasty. Watch it closely — chilli flakes scorch in seconds.

— This one step is where the colour and most of the flavour come from. Do not rush it and do not let it smoke.