Wash the fresh spinach under cool running water, trim the ends, and cut into 2-inch pieces.

In a large pot, bring salted water to a boil. Blanch the spinach for about 30 seconds.

Transfer the spinach to a bowl of ice water for 1-2 minutes to cool down, then squeeze out excess water.

In a mixing bowl, combine the spinach with minced garlic, chopped green onion, soy sauce, salt, toasted sesame oil, and toasted sesame seeds.

Serve the dish cold or at room temperature as a side.