Prepare the broth: Add chicken broth to a medium saucepan over medium heat. Stir in the ginger, garlic, soy sauce, salt, and white pepper. Then, bring to a gentle simmer. If you want a slightly thicker soup – sprinkle xanthan gum over the broth and whisk continuously to prevent clumps.
Create the egg ribbons: Using a spoon or fork, stir the broth in a circular motion to create a gentle whirlpool. While stirring, slowly drizzle the whisked eggs in a thin stream into the soup. The eggs will form delicate ribbons.
Finish cooking: Let the soup sit undisturbed for 30-60 seconds to allow the eggs to set properly.
Add final touches: Remove from heat and stir in the sesame oil.
Serve: Ladle into bowls and garnish with sliced green onions and red pepper flakes if desired (I actually prefer skipping those).