Dice the potatoes and onion.
Soak the dried seaweed in water, then cut into bite-sized pieces.
Add sesame oil to a pot and stir-fry the seaweed.
Add the potatoes and onion, and stir-fry together.
Pour in water and bring to a boil.
When the potatoes are cooked, season with soy sauce for soup and salt.
Add garlic and simmer for a bit longer.