Trim about 1 inch from the root end of the enoki mushrooms and gently separate them into small bite-sized bundles using your fingers.
Rinse the mushrooms carefully under cold water and drain well.
Bring a large pot or wok of water to a boil.
Blanch the enoki mushrooms in two batches for about 1 minute per batch until just tender.
Drain thoroughly and arrange the mushrooms neatly on a serving plate.
Heat the vegetable oil in a small saucepan over medium heat.
Add the minced garlic and cook for about 10 seconds until fragrant without allowing it to brown.
Stir in the light soy sauce, sugar, and chopped scallions.
Bring the sauce to a gentle boil, then immediately remove it from the heat to preserve the fresh garlic and scallion flavor.
Slowly pour the hot garlic and scallion sauce evenly over the blanched enoki mushrooms.
Serve immediately while warm.