Bring a pot of salted water to a boil and cook the noodles until about one minute before al dente.
Reserve a few tablespoons of noodle water before draining the noodles.
Add the minced garlic and chili flakes to a small amount of oil in a pan and cook until fragrant and lightly toasted.
Stir in the soy sauce, sugar, and reserved noodle water. Simmer until the sauce begins to thicken slightly.
Add the drained noodles to the pan. Toss continuously until the sauce coats the noodles evenly.
Transfer the noodles to a bowl and optionally garnish with chili flakes, sesame seeds, and scallions.
