OijiSalt-brined cucumber pickle
Oiji is the Korean way of keeping early-summer cucumbers into the dog days. In June, when short, thin-skinned pickling cucumbers flood markets from Seoul to the southern provinces, they are packed into a crock and covered with boiling salt brine, which keeps them crisp. A week later they are olive-gold, wrinkled and sour-salty. Nobody eats them straight: they are sliced, soaked and squeezed, then dressed as oiji muchim with chilli flakes, garlic and sesame, or floated in cold water with vinegar and spring onion as oiji naengguk, a cooling summer soup. Over rice on a hot afternoon, the crunch is everything. The brine is about 10% salt (200 g per 2 litres of water), strong enough to keep them all summer. The common mistake is leaving any cucumber above the brine; it softens and moulds, so weigh them down well. It is ready when the cucumbers are evenly yellow-green, wrinkled and firm, and the brine smells cleanly sour. Normal: cloudy brine and bubbles; bad: fuzzy coloured mould, mushy or slimy cucumbers, a rotten smell. Chef's tip: squeeze the soaked slices in a cotton cloth as hard as you can before dressing; the drier they are, the better they crunch.