Prep the Cabbage
Slice napa cabbage into halves or quarters, keeping the stems intact.
Rinse thoroughly.
In a large bowl, dissolve 1.5 cups salt in 16 cups water.
Place cabbage in brine; sprinkle extra salt between leaves.
Let sit 4–6 hours, turning occasionally.
Rinse cabbage 3 times in cold water. Drain for 30 minutes.
Make the Kimchi Paste
In a small pot, whisk glutinous rice flour into 360 ml water.
Cook over low heat, stirring, until thickened. Let cool.
In a bowl, combine cooled rice paste, gochugaru, fish sauce, saeujeot (or vegan alternative), garlic, ginger, blended onion, and optional pear. Mix well until bright red and fragrant.
Assemble the Kimchi
Wearing gloves, gently coat each cabbage leaf with paste.
Tuck carrot, radish, chives, and scallions between leaves for flavor and crunch.
Fold and pack cabbage tightly into a food-safe container or glass jar, pressing out air.
Ferment
Leave at cool room temperature (about 3°C/37°F if possible) for 1–2 days.
Look for bubbles and a tangy aroma.
Transfer to refrigerator to slow fermentation.
Taste after 3–4 days. For deeper flavor, let age 2 weeks or more.