Wash the potatoes and seafood thoroughly, then cut them into bite-sized pieces.
Slice the onion and carrot into pieces that are easy to eat.
Add cooking oil to a pan and stir-fry the potatoes and carrots first.
Add the seafood and continue stir-frying before adding the onion.
Pour in soy sauce, minced garlic, gochujang (Korean chili paste), and water, then simmer over medium-low heat.
Let it braise until the potatoes are cooked through, then add green onion and sesame oil to finish.