Dice pork, onion, potato, and zucchini into cubes.
Heat oil in a pan and stir-fry the pork.
Add onion, potato, and zucchini and stir-fry together.
Add black bean paste (chunjang) and stir-fry.
Add water, potatoes, and onions, and bring to a boil.
Add starch water to thicken the sauce.
Pour over cooked noodles to finish.