You can use quite a variety of vegetables, as long as the chinese leaves predominate.
If you're planning to use seaweed, put it on to soak the night before.
thoroughly clean the large pan before use
Cut the Chinese leaves in half, and remove the very solid section at the base, and then cut into 3rds along the length,
Then chop into 5 starting at one end. Cut them at an angle so the cut edges are chamfered. This improves the mouthfeel.
Put into the pan, scrunching it to separate the leaves as you do. Sprinkle liberally with the sea-salt. If you're using sea-weed, you can add it at this point.
keep on going until you have nearly filled the pan - there should be a bit of space at the top.
sprinkle 350g of the water on top, preferably bottled, filtered or boiled water so as to not interfere with the ferementation. Chlorine in the municipal water supply will inhibit the natural fermentation. Cover and leave. Turn over every 20 minutes or so.
weigh the 30g of rice flour & 35g of sugar into a smallish pan, and add enough water - around 300 mil to make a light liquid. Add a little of the water at first and break all the lumps up with the back of a spoon. After that you can add the rest of the water. The sugar is to help feed the fermentation but needs to be disolved properly.
Bring to the boil slowly, stirring all the while until you have slightly gloopy, but not too thick (or thin) sauce. Allow to cool a bit before the next step.
allow to cool to around 25°C & then add in the 32g of red pepper powder and stir. It may not be strictly necessary to cool it, but there may be some probiotic elements in the flakes and adding them to the hot liquid would kill them.
While the rice flour & sugar sauce is cooling, peel the onion, garlic and wash the ginger. Add it all to a food processor along with the miso if you're adding that.
Pulse blitz it until it's nice and fine - it will be quite wet.
grate the mooli/white raddish as well as the carrot, in a food processor (or hand grate).
in about 2 to 3 hours, a lot of water will have come out of the leaves and they will have shrunk quite a bit. Half fill the pan and stir well, then drain. Repeat 2 more times. You need to have washed most of the salt off or it will be too salty.
at this point you can either wring it with your hands or pummel it a bit - not too much though - with a potato masher or the base of a large jar.
pour off any excess liquid, released by the squeezing, and add in the grated/chopped other veggies and add the chopped corriander and Chinese chives......
Once the rice mixture has cooled to room temperature add in the blitzed garlic, onion, ginger and also the 30g of fish sauce, stirring well to combine
add the sauce to the veggies in the main pan mix to combine everything stirring it very well to distribute the sauce evenly into the veggie mixture.
spoon the resulting mixture into the 3 litre jar. There should be a 3 to 5cm space at the top. Level the surface and close the lid with the spring catch.
place in a cool, but not cold room - it wants to be 16°C to 18°C. Leave it there for 5 to 7 days or so, then place in the fridge. It can be eaten after the initial 5-7 days but is better with a more complex taste after at least 7 days in the refrigerator. The flavour will continue to improve or develop, but after 4 to 6 months it will start to become sharp/bitter so it is better enjoyed before that point is reached.