Cut pork, onion, potato, and zucchini into bite-sized pieces.
Heat some cooking oil in a pan and stir-fry the pork.
Once the meat is cooked, add onion, potato, and zucchini and stir-fry.
Add chunjang (black bean paste) and stir-fry carefully over low heat.
Add water and potato starch to thicken the sauce.
Boil the noodles in boiling water, then rinse with cold water.
Top the boiled noodles with the stir-fried black bean sauce and mix well before eating.