Oiji (Salt-Cured Cucumber)

Ingredients

Equipment Needed

• •2-liter heatproof glass jar, onggi crock, or food-safe container
• •Clean fermentation weight, small plate, or brine-filled zipper bag
• •Large pot for boiling brine
• •Disposable glove or very clean hand for mixing

Instructions

1. 1

   Choose and wash

   Choose small, firm cucumbers no thicker than 1 inch across if you can. Large watery cucumbers cure unevenly and soften at the center. Wash them well, but don't scrub off the skin until it tears. Trim only the very ends if they are rough.

   If you cannot find Korean cucumbers, Kirby cucumbers are the best substitute. English cucumbers are too watery for this cure.
2. 2

   Boil the brine

   Bring 8 cups water and 1 cup salt to a full boil, stirring until the salt dissolves. This brine is strong on purpose, about 12 percent by weight. Too little salt gives you soft cucumbers and trouble in the jar. If using soju, stir it in after the brine comes off the heat.

   Soju is a modern helper, not the spine of the recipe. It can discourage surface spoilage, but it cannot replace enough salt, clean tools, and keeping the cucumbers submerged.
3. 3

   Pack and weight

   Pack the cucumbers tightly into a clean heatproof jar, onggi crock, or food-safe container. Pour the hot brine over them until covered. Set a clean plate, glass weight, or brine-filled zipper bag directly on top so every cucumber stays under the surface. Any cucumber that floats will soften first. My teacher would press the weight twice, then look away. That was the whole lecture.

4. 4

   Cure until wrinkled

   Cover loosely and leave at cool room temperature for 2 to 3 days, then refrigerate. The cucumbers are ready when they turn olive yellow, wrinkle slightly, and feel firm when pinched. In a hot kitchen, check after 36 hours. In a cooler one, they may need a fourth day. Taste the brine only with a clean spoon.

5. 5

   Store submerged

   Once cured, keep the oiji fully submerged in its brine in the refrigerator. They will keep 3 to 4 weeks if your tools were clean and the brine stays clear. If you see mold, a bad smell, or slippery cucumbers, throw that batch away. Food is respect for life, not a dare.

6. 6

   Soak and slice

   For oiji-muchim, take out 4 cured cucumbers and slice them into thin coins, about 1/8 inch thick. Soak in 2 cups cold water for 10 to 15 minutes, then taste one. It should still be pleasantly salty, not harsh. Drain and squeeze hard by hand, a handful at a time, until no water drips freely. This squeeze is the difference between crisp banchan and a watery bowl.

7. 7

   Dress by hand

   Put the squeezed cucumber in a bowl with scallion, garlic, gochugaru, sesame oil, sesame seeds, and sugar if the cucumbers taste very sharp. Mix by hand, lightly but thoroughly. Let it taste like cucumber first, sesame second, chili last. Serve cold in a small banchan dish with rice.

Chef Tips

• •Use a real weight. A cucumber bobbing at the top looks harmless, then it turns hollow and soft. The brine has to touch every side, every day.
• •Do not skip the soak before dressing. Oiji is a preserved cucumber first, a banchan second. You remove enough salt to eat it, but not so much that it becomes plain cucumber again.
• •For oiji-naengguk, slice and soak 2 cured cucumbers, then add 2 cups cold water, 1 tablespoon vinegar, 1 teaspoon sugar, a few ice cubes, sesame seeds, and a little scallion. It is what you make when the rice is hot and the room is not kind.

Advance Preparation

• •Oiji must be made at least 3 days ahead before it is sliced and dressed. After curing, keep the cucumbers submerged in brine in the refrigerator for 3 to 4 weeks.
• •Dress only what you will eat within 2 days. Once sliced, soaked, and seasoned, oiji loses its snap faster than whole cucumbers kept in brine.

Frequently Asked Questions

Nutrition Information

1 serving (about 150g)