Oi sobagi (Korean stuffed cucumber kimchi)

Korea's summer kimchi: small cucumbers split and stuffed with gochugaru, garlic, and salted chives

Origin: Seoul, Korea

From the journey of Cucumber.

Oi sobagi (오이소박이) is one of Korea's most beloved kimchi varieties; not the standard fermented napa cabbage but whole small cucumbers, scored at one end into a cross and stuffed with a vibrant filling of gochugaru, garlic, ginger, spring onion, salted chives, and fish sauce, then briefly fermented until pleasantly sour and alive with lactic culture. Korea has one of the world's most sophisticated and diverse fermentation traditions; over 200 distinct kimchi varieties exist; and oi sobagi represents the summer category. Unlike baechu kimchi (which requires weeks of fermentation to reach its peak), oi sobagi belongs to the geotjeori category of fresh kimchi: ready in a few hours or overnight, often made on the same morning it will be served. The word sobagi means 'stuffed' in Korean. Cucumber kimchi is inherently a summer dish; cucumbers reach their peak in the warm months, and the light, fresh ferment of oi sobagi contrasts beautifully with the heavier, more pungent winter kimchi. The cucumbers for this dish must be Korean cucumbers (crunchy, thin-skinned, small; about 15cm long) or Persian cucumbers; English or Dutch cucumbers are too large, too watery, and too thin-flavoured to produce the right result. The stuffing should be assertive; more gochugaru than seems reasonable, fragrant with garlic and ginger; because the cucumber dilutes the heat as it marinates.

Ingredients

Cucumber

  • 8 Korean or Persian cucumbers, small, firm, thin-skinned, about 15cm long
  • 2 tbsp coarse sea salt (non-iodised), for salting the cucumbers

Stuffing

  • 3 tbsp gochugaru (Korean red chilli flakes), medium heat; adjust to taste
  • 4 cloves garlic, grated to a fine paste
  • 1 tsp fresh ginger, grated to a paste
  • 3 spring onions (scallions), very thinly sliced
  • 30 g buchu (Korean salted chives) or fresh garlic chives, cut into 2cm lengths, substitute with regular chives if needed
  • 1 tbsp fish sauce (aekjeot), or soy sauce for a vegan version
  • 1 tsp saeujeot (salted fermented shrimp), optional but deepens the flavour significantly
  • 1 tsp granulated sugar
  • 1 tsp toasted sesame seeds

Method

  1. Trim both ends of each cucumber. Cut them into 6–7cm segments (you should get 2–3 segments per cucumber). Stand each segment upright and cut a deep cross from the top almost to the bottom, stopping about 1cm from the base; the four quarters should open like a flower but remain attached at the root end.
  2. Rub the cut cucumbers inside and out with the coarse salt, getting the salt into the cut cross. Place in a colander over a bowl and leave for 20–30 minutes. The cucumbers will release water and become slightly limp; this is correct. Rinse lightly under cold water and gently pat dry. They should still have salt flavour.
  3. Make the stuffing: combine the gochugaru, garlic paste, ginger paste, fish sauce, saeujeot (if using), and sugar in a bowl. Mix well. Add the spring onions and garlic chives and toss to coat. Taste; it should be intensely spicy, savoury, garlicky, and slightly sweet. Wear gloves; gochugaru stains permanently.
  4. Gently open each cucumber segment at the cross and press a generous amount of stuffing into the cavity, packing it in. Some stuffing will overflow onto the outside; this is fine and contributes to the flavour of the finished dish.
  5. Arrange the stuffed cucumbers in a single layer in an airtight container. Scatter the sesame seeds over the top. Leave at room temperature for 1–2 hours for a fresh, slightly spicy pickle; refrigerate overnight for a more developed, lightly fermented flavour. Taste before serving and adjust salt if needed.

Notes

Oi sobagi is best eaten within 2–3 days; unlike baechu kimchi it does not improve with long aging and the cucumbers begin to lose their crunch after 3–4 days. Serve as banchan (a side dish) alongside steamed rice, grilled meats, or bibimbap. The vegan substitution (soy sauce in place of fish sauce and saeujeot) works well. Korean cucumbers or Persian cucumbers are strongly preferred; English cucumbers can be used but must be salted more aggressively and the result will be noticeably less crunchy.

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