Korean
Heat 2 tbsp of the oil in a small pan over low heat, add the chunjang and fry for 3 minutes, stirring constantly, until fragrant; set aside with its oil.
Heat the remaining oil in a wok or large pan over medium-high heat and fry the pork for 4 minutes until browned.
Add the potato and fry for 3 minutes, then add the onions and zucchini and fry for 4 minutes more, until the onions soften.
Stir in the fried chunjang and the sugar, pour in the water, bring to a boil and simmer for 10 minutes until the potato is tender.
Stir the starch mixture, pour it into the sauce and cook for 1-2 minutes, stirring, until thick and glossy.
Meanwhile boil the noodles in plenty of water for 4-5 minutes, drain, rinse briefly in warm water and divide among 4 bowls.
Ladle the sauce over the noodles and top with cucumber strips; mix well before eating.