Finely chop the onion and green onion.
Stir-fry minced pork in a pan with cooking oil.
When the pork is cooked, add chopped onion and green onion and continue stir-frying.
Add black bean paste (chunjang/jjajang) and stir-fry over low heat with the oil.
Add water, potatoes, zucchini, and cabbage, then bring to a boil.
When the potatoes are cooked, add starch water to adjust the thickness.
Season with soy sauce, sugar, and pepper, then finish.