Step 1

Place cabbage in a large bowl and sprinkle salt over. Massage into leaves with your hands until cabbage starts to release its liquid. Pour in cold water to cover and let cabbage soak 1 hour.

Step 2

Drain cabbage, reserving 2 cups brining liquid. Rinse cabbage in 3 changes of water, then drain well and transfer back to bowl.

Step 3

Mix ginger, garlic, fish sauce, soy sauce, and sugar in a small bowl to form a smooth paste. Stir in gochugaru (use 2 Tbsp. for a mild kimchi and up to 5 Tbsp. for an extra-spicy one).

Step 4

Add paste, scallions, and mixed vegetables to bowl with cabbage. Toss everything together with your hands (foodsafe gloves are welcome here) until cabbage and vegetables are evenly coated with paste.

Step 5

Tightly pack kimchi into jars, pressing down firmly to eliminate air bubbles and release more liquid from vegetables, leaving 1" headspace at the top. If there isn’t enough liquid to completely submerge vegetables, top off with reserved cabbage brine. Cover jars tightly with lids and let sit at room temperature away from direct sunlight, opening jars to let gases release once a day, for at least 1 day and up to 5 days to ferment (the longer the kimchi sits, the more sour it will be). Give kimchi a taste as you go and add a splash of fish sauce or soy sauce as needed. Once you’re satisfied with the flavor, transfer jars to the refrigerator, where the kimchi will continue to slowly age.Do ahead: Kimchi can be made 1 month ahead. Keep chilled.