Boil 8 to 10 cups of water in a large pot.
Blanch the spinach for 30 seconds to 1 minute with lid off, stirring with a wooden spoon.
Strain the spinach and rinse in cold water a couple of times to remove any residual dirt.
Squeeze out excess water and cut a few times into bite size pieces.
Mix the spinach with garlic, green onion, soy sauce, toasted sesame oil, and sesame seeds in a mixing bowl by hand.
Transfer to a bowl or plate and garnish with silgochu, if used.
Serve with rice.
