Cut the potatoes into bite-size chunks. Cut the onions into wedges. And cut the carrot into random pieces. Boil the konnyaku noodles for about 5 minutes and drain water. Cut them into bite-length.
Heat the oil in a pot and fry the onion for 2 minutes. Add the carrot and the potatoes and keep frying. Put the meat and the konnyaku noodles over them. Add the soy sauce and the sugar. Then, cover with a lid. Don't mix them now.
Turn down the heat to medium-low heat and simmer for 15 minutes with the lid. 15 minutes later, open the lid and mix all ingredients in the pot.
Simmer with the lid again for 8 ~ 10 minutes over medium-low heat until the potatoes are cooked. Open the lid and add some butter.
