Blanch the dandelion or wild lettuce greens for 30 seconds in unseasoned boiling water. You could also lightly steam the greens.
Drain the greens, spread on a tray to cool, then mix with the salt and rest for 30 minutes.
Rinse the greens well with fresh water and squeeze them dry.
Chili Paste
Bring the water, maple syrup and fish sauce to a simmer with the rice flour until thickened, then cool to room temperature.
Add the grated or minced garlic and ginger.
Mix the cooked greens, green onions and chili mixture together well. Taste the mixture for spiciness. Add more chili flakes if you want.
At this point sometimes I add a handful of herbs like cilantro or culantro.
Pack the kimchi into a jar, pressing it down to cover with the liquid and screw on the lid.
Fermentation
Leave the kimchi out at room temperature for at least a week or two, When it's sour to your liking, refrigerate it. *See note
The kimchi will for a very long time-years if you want, and will continue to get more sour in the fridge. Remember to press the greens under their liquid and stir the jar occasionally.
Video
Notes
I may leave my kimchi out for a month or more to ferment if I want it very sour. I've even forgotten about jars in my garage for multiple years which were still perfectly fine to eat.
This will make a mildly spicy kimchi. Feel free to add your favorite hot or dried peppers to increase the heat, or just add more gochugaru chili flakes.