- 6 scallions, divided
- 2 cups water
- 1 1/2 cups reduced-sodium chicken broth
- 1 (2-inch) piece peeled ginger, sliced
- 1 skinless boneless chicken breast half (6 to 8 ounces)
- 2 large eggs, lightly beaten
- 1/4 teaspoon white pepper (optional)
- Asian sesame oil
- Smash 3 scallions and cut into 2-inch pieces, then put in a 2-quart saucepan with water, broth, ginger, and 3/4 teaspoon salt. Bring to a simmer, then poach chicken at a bare simmer, uncovered, until just cooked through, 12 to 15 minutes. Transfer chicken to a cutting board and let broth steep, covered, 10 minutes.
- Meanwhile, chop remaining 3 scallions and shred chicken.
- Discard scallions and ginger from broth and bring to a brisk simmer. Add beaten eggs in a slow stream, stirring constantly. Remove from heat and stir in scallions, chicken, and white pepper (if using). Serve drizzled with sesame oil.