3 pounds Korean radish (mu) – peeled and cut into 1-inch cubes
2.5 tbsp coarse sea salt
1 tbsp sugar
0.5 cup Korean red pepper flakes (gochugaru)
3 tbsp fish sauce
2 tbsp salted shrimp (saeujeot) – finely chopped
2 tbsp garlic – minced
2 tsp ginger – minced
0.25 cup water
4 scallions – cut into 1-inch pieces
Instructions
Wash a 2-quart glass jar and lid with hot, soapy water and let air-dry.
Place the cubed Korean radish in a large bowl. Sprinkle with coarse sea salt and sugar, toss well, and let stand 45 minutes, tossing once or twice, until the radish releases liquid and softens slightly.
Drain the radish in a colander, reserving 2–3 tablespoons of the brine if possible. Do not rinse. Return the radish to the bowl.
In a separate bowl, mix the gochugaru, fish sauce, salted shrimp, minced garlic, minced ginger, and the water (or reserved brine) to form a thick paste.
Add the paste and the scallions to the drained radish. Toss with gloved hands until every piece is evenly coated and the mixture is glossy and slightly juicy.
Pack the kimchi into the clean jar, pressing down firmly to remove air pockets and to bring the brine up to cover the radish. Leave 1–2 inches of headspace.
Wipe the rim, seal loosely (or use an airlock lid), and leave at cool room temperature (65–72°F) for 24–48 hours. Burp once daily if using a standard lid. Ferment until you see active bubbles and the brine rises to cover, and the taste is lightly tangy.
Tighten the lid and refrigerate at least 12 hours before serving to settle flavors. The kimchi will continue to mature over 1–2 weeks; keep the radish submerged in brine and use clean utensils each time.