Cut the onion and pork into bite-sized pieces.
Add cooking oil to a pan and stir-fry the pork.
Once the pork is cooked, add the onion and stir-fry together.
When the vegetables are cooked, add the chunjang (black bean paste) and stir-fry more.
Add water, potatoes, zucchini, and potato starch, then bring to a boil.
Simmer until all ingredients are fully cooked and finish.