The restaurant obviously deep fries their guljeon in a generous amount of oil for an extra crispy and crunchy exterior while keeping the interior delicately soft.
Clean the oysters by gently swishing them around in salted water. Drain. Rinse again in clean water and keep them in a strainer over a bowl to drain well.
Heat oil in a non-stick pan over medium high heat. Depending on the size of your pan, you can cook 5 to 6 pancakes at once. Cook until the bottom is golden brown.