Cut the vegetables such as onion, pork, and zucchini.
Heat oil in a pan and stir-fry the pork.
Add the onion and zucchini and stir-fry together.
Add the black bean paste (chunjang) and mix well with the ingredients, stir-frying thoroughly.
Add water, potatoes, and sugar, then bring to a boil.
Add starch water to thicken the sauce.
Pour the sauce over the boiled noodles.