Bring a large pot of water to a boil. Add fresh spinach and blanch for about 30 seconds.

Drain the spinach into a colander, rinse under cold water, and squeeze out excess moisture. Roughly chop the spinach.

In a medium bowl, whisk together sesame oil, soy sauce, minced garlic, rice vinegar, and a dash of sugar until combined.

Add the chopped spinach to the dressing and toss until evenly coated.

Sprinkle toasted sesame seeds and sliced green onions on top if desired.

Serve chilled or at room temperature.