Bring the chicken stock to a simmer in a medium soup pot. Stir in sesame oil, salt, sugar, white pepper. Add the turmeric (or food coloring). Taste the soup and adjust seasoning if necessary.
Next, make the cornstarch slurry by mixing 3 Tbsp. cornstarch with 1/3 cup cold water. Stir until a smooth paste is formed. Stir the soup constantly as you drizzle the cornstarch mixture into the soup.
Lightly beat 3 eggs. If you want larger "egg flowers", using a ladle, slowly stir the eggs into the soup. The faster you stir, the more the beaten eggs get integrated.
Ladle soup into bowls, top with sliced scallions and serve.