Start heating a pot of water with a steaming basket. While you wait for the water to boil, wash, peel and cut 100 g carrot, 100 g lotus root (renkon), 100 g burdock root (gobo) and 150 g Japanese taro (satoimo) according to the notes in the ingredient list. As each ingredient is cut, place the pieces in a bowl of cold water to prevent discoloration.
Once the water is boiling, place all the root vegetables in the steaming basket and steam for 10 minutes over medium heat. (When the time is up, immediately remove the basket from the heat to avoid overcooking.)
Heat a large pot on medium and once hot, add 1 tbsp toasted sesame oil. Place 300 g boneless chicken thigh in the pot with the skin side down and sear on all sides.
Add the steamed root vegetables, 3 fresh shiitake mushroom and 200 g konjac (konnyaku) to the pot and mix until evenly distributed.
Next, add 500 ml dashi stock, 2 tsp light brown sugar and 4 tbsp sake.
Place a drop-lid (or piece of foil/baking paper) on top directly touching with the ingredients and broth. Bring to a boil, then turn the heat down to medium-low and simmer until the liquid is reduced by half (approx 10 mins).
Peel back the drop lid and add 4 tbsp mirin and 4 tbsp Japanese soy sauce (koikuchi shoyu), then tilt the pan to evenly distribute the condiments through the broth (don't mix). Place the drop lid back on and continue to cook until the liquid is reduced by one-third.
Optional step: For a deeper flavor, turn off the heat, cover and allow it to cool/rest for 1 hour. Once it's cool to the touch you can store it in the refrigerator.
Add the ½ tbsp Japanese soy sauce (koikuchi shoyu) and 1 tbsp mirin to the pan, bring to boil and then lower the heat to a simmer. Tilt the pan occasionally to move the liquid around, do not mix.
Bring a small, separate pot of water to a rolling boil and blanch 10 snow peas for 30-60 seconds.
Remove the snow peas from the pot using a mesh spoon and rinse them under cold water. Cut in half diagonally.
Divide the chikuzenni into serving dishes and decorate with the blanched snow peas. Enjoy!
Notes
Traditionally people parboil each vegetable separately, but I used the steaming technique to make it quicker and easier.If you don't want to wait for 1 hour to cool down, you can skip the step and add the finishing mirin and soy sauce straight away.