Bring the chicken stock to a simmer in a medium pot then stir in the sesame oil, salt, sugar, white pepper, turmeric and MSG (if using). Taste the soup, and adjust the seasoning to your taste.
Next add the cornstarch and water mixture. Stir the soup continuously as you drizzle in the cornstarch slurry to make sure there are no clumps.
Use a spoon to stir the soup and slowly drizzle in all of the beaten eggs until until ribbons form.
Pour the soup into bowls and garnish with green onions, then serve!