Boil a large pot of water over high heat for about 5 minutes.

Add the dry instant ramen noodles to the boiling water and cook for approximately 3 minutes.

In a mixing bowl, combine soy sauce and brown sugar; whisk until dissolved.

Heat sesame oil in a large pan over medium heat; add green onion and minced garlic, stirring for about 1 minute.

Stir in red chili flakes, then add the prepared sauce mix and reserved noodle water; simmer for 1 minute.

Add drained noodles to the pan and gently toss for 1-2 minutes until coated.

Serve in bowls and garnish with chopped green onion.