Cut the zucchini and onion into bite-sized pieces.
Heat cooking oil in a pan and sauté the minced garlic.
Add the zucchini and onion and stir-fry lightly.
Pour in the anchovy broth and bring to a boil.
Season with gochugaru (Korean chili flakes) and soup soy sauce.
Slice and add Cheongyang chili pepper, then let it boil once more.