Put kombu/shiitake into 600 ml water. Soak overnight in a fridge. (The kelp and mushrooms are edible and nutritious, so cut them into small pieces and use them as a part of the ingredients unless it’s not your cup of tea) Cut potatoes, a carrot, and an onion into equally large chunks. By cutting them into the same size, everything will be cooked nice and evenly. Big chunks are preferred traditionally to enjoy rich texture.
In a large pot, sprinkle cooking oil. Add the onion and stir over mid-high for 2-3 minutes.
Meanwhile, in a medium pot, boil water with a pinch of salt. Add snow peas and blanch for 1 minute. ( Note: Salt is used to make the color brighter!) Set them aside for the final garnish.
Cook soy mock meat in the boiled water in the same medium pot for 5 minutes. Rinse it off with cold water in a colander while squeezing with your hands a couple of times (for soy meat to get better soaked in flavor )
Into the large pot, add kombu dashi, mirin, and sake (,and sugar if you use one instead of amazake).
Add potatoes, carrot, shirataki, and soy meat.
Mix miso, soy sauce, and amazake, then add this mixture to the pot.
Cover everything with an aluminium foil lid. Simmer for 10-12 minutes over mid-high.
Cool it down for 30-60 minutes. If you can touch the pan safely, it's ready. Because the flavor sits inside when cooled, doing so enables the ingredients to absorb the umami-rich soup!
Re-heat gently before serving. Add snow peas on top, and enjoy!