Galchi-sokjeot (갈치속젓, Salted Hairtail Innards)

Ingredients

Equipment Needed

• •Digital kitchen scale
• •500ml sterilized glass jar with tight lid
• •Small fermentation weight or boiled flat stone
• •Disposable gloves
• •Fine sieve
• •Small knife or kitchen scissors

Instructions

1. 1

   Choose the fish

   Buy hairtail innards only from fish that are very fresh, with clean ocean smell and firm silver skin on the whole fish. Ask the fishmonger to reserve the innards from the same morning's hairtail, and keep them on ice until you get home. If the fish was not commercially frozen for parasite control, freeze the cleaned innards at minus 20 degrees C for 7 days if your freezer reliably reaches that temperature. If it does not, use the finished jeotgal only in cooked soups and stews.

   This is raw fermented fish offal. Do not serve it uncooked to pregnant people, young children, older adults, or anyone immunocompromised. Tradition is not an excuse to be careless.
2. 2

   Ready the jar

   Wash a 500ml glass jar, lid, and fermentation weight with hot soapy water, rinse well, then pour boiling water over them and let them air-dry completely. Water left in the jar weakens the salt ratio, and the salt ratio is the wall that keeps this preserve safe.

3. 3

   Trim the innards

   Put on gloves. Pick through the innards and remove every green, black, or dark bitter gall bladder, along with any torn pieces stained with bile. Keep clean liver, stomach, intestine, roe, or milt if they smell fresh. Split thick stomach pieces and rinse out any contents. My teacher made us do this without talking. 눈동냥, 귀동냥, borrowing with the eyes and ears. One missed gall bladder can bitter the whole jar.

4. 4

   Rinse in brine

   Dissolve 15g sea salt in 500ml ice-cold water to make a 3 percent brine. Swish the trimmed innards gently in this brine for 30 seconds, then lift them out and drain in a sieve for 10 minutes. Do not soak them in plain water. Plain water pulls out flavor and softens the texture, while light brine cleans without stripping the fish.

5. 5

   Weigh and salt

   Weigh the drained innards. Use coarse salt equal to 25 percent of that weight: for 400g innards, use 100g salt. Toss the innards with two-thirds of the salt until every surface is gritty and coated. Put the remaining salt in the jar in layers, a little on the bottom, innards in the middle, and the last salt on top. 손맛 is real, and I still measure it. Too little salt invites spoilage; too much salt stops the ferment from becoming deep.

6. 6

   Pack it down

   Press the salted innards firmly into the jar with a clean spoon or gloved hand, removing air pockets. Pour the soju over the top if using. It is not there to perfume the jeotgal; it rinses the surface and gives a little protection at the start. Set a small fermentation weight or a boiled flat stone on top so the innards stay under the brine that forms.

7. 7

   Ferment cold

   Cover the jar and set it in the refrigerator, ideally 2 to 5 degrees C, for 6 weeks. For the first 3 days, loosen the lid once a day to release pressure, then tighten it again. After the first week, stir once a week with a clean spoon and press everything back under the brine. Traditional crocks sat in cool outdoor air, but a modern refrigerator is the honest vessel for a home kitchen.

8. 8

   Judge the ferment

   After 4 weeks it can be used, but 6 to 8 weeks gives better depth. The finished galchi-sokjeot should smell strong, salty, and marine, not rotten or sweet. The liquid will be dark amber-brown, and the solids will have softened into a loose paste. Discard the whole jar if you see fuzzy mold, pink growth, slimy foam, or a smell like sewage. Do not rescue bad jeotgal with more salt.

9. 9

   Store cleanly

   Transfer to smaller sterilized jars if you like, pressing the solids below their brine each time. Keep refrigerated and use within 6 months. Always use a clean spoon. One dirty spoon is enough to ruin what six weeks made.

10. 10

    Season to serve

    For a small table portion, mince 2 tablespoons mature galchi-sokjeot with 1 teaspoon gochugaru, 1 minced small garlic clove, 1 teaspoon chopped scallion, and 1/2 teaspoon toasted sesame oil. Eat that mixture the same day with hot rice, boiled pork, or lettuce wraps. Do not stir sesame oil and fresh aromatics into the storage jar. They are for tonight's bowl, not for keeping.

Chef Tips

• •If your fishmonger cannot give you innards from very fresh hairtail, stop and make another jeotgal another day. Technique first, yes, but poor offal is not an ingredient to argue with.
• •Use a digital scale. A traditional handful can be beautiful in the hand of the person who learned it for forty years. For the rest of us, 25 percent salt by weight is how the dish survives the hand that makes it next.
• •Use this with restraint. For kimchi, start with 1 tablespoon galchi-sokjeot for every 1kg salted cabbage or radish, then adjust only after tasting the whole seasoning paste. It should deepen the kimchi, not make it taste only of fish.
• •For soups and jjigae, begin with 1 teaspoon in 4 cups broth, dissolved well, then taste before adding salt or soy sauce. Galchi-sokjeot brings salt and savor together, so it replaces part of both.
• •If the finished jeotgal is too chunky for kimchi paste, chop it by hand or pulse it once or twice in a small processor. Do not blend it smooth like sauce. A little texture is part of the condiment.

Advance Preparation

• •This is a make-ahead preserve by nature. Plan on 4 weeks minimum before use, with 6 to 8 weeks giving a deeper, rounder jeotgal.
• •You can portion the finished jeotgal into small sterilized jars after fermentation. Keep one jar for current use and leave the others unopened in the refrigerator to reduce contamination.
• •For kimjang or a large kimchi day, make this at least 6 weeks ahead. The finished jeotgal can be stirred straight into kimchi paste, 1 tablespoon per 1kg salted cabbage as a starting measure.

Frequently Asked Questions

Nutrition Information

1 serving (about 21g)