Prepare the ingredients: peel and slice 3 potatoes and 1/2 onion.

Soak the potato slices in water for 5 minutes to remove excess starch, then drain.

Prepare kelp water by soaking kelp in cold water.

Heat 2 tbsp vegetable oil in a pan and sauté the potatoes and onions until lightly browned.

Add 1 cup of kelp water to the pan.

Add 1 tbsp sugar and bring the mixture to a boil.

Add 1 tbsp minced garlic, 3 tbsp soy sauce, and 1 tbsp corn syrup to the pan.

Simmer the mixture until the potatoes are tender and the sauce thickens.

Add 1 tbsp sesame oil and gently mix.