If you want a spicy kick, add Cheongyang chili pepper or chili flakes.
Add 2 coins of anchovy/kombu stock cubes to water and bring to a boil.
Once the water boils, add the cleaned bean sprouts, cover, and boil for about 5 minutes.
Add soy sauce and minced garlic, then boil a bit longer.
Right before turning off the heat, add chopped green onion and season with Miwon (MSG) or salt to taste.
Finish with a sprinkle of black pepper.